diff --git a/Marlin/Configuration.h b/Marlin/Configuration.h
index 5d9586808a..8d3e75dae9 100644
--- a/Marlin/Configuration.h
+++ b/Marlin/Configuration.h
@@ -503,7 +503,7 @@ const bool Z_PROBE_ENDSTOP_INVERTING = false; // set to true to invert the logic
   // If you would like to use both a Z PROBE and a Z MIN endstop together or just a Z PROBE with a custom pin, uncomment #define Z_PROBE_ENDSTOP and read the instructions below.
   // If you want to still use the Z min endstop for homing, disable Z_SAFE_HOMING above. Eg; to park the head outside the bed area when homing with G28.
   // WARNING: The Z MIN endstop will need to set properly as it would without a Z PROBE to prevent head crashes and premature stopping during a print.
-  // To use a separte Z PROBE endstop, you must have a Z_PROBE_PIN defined in the pins.h file for your control board.
+  // To use a separate Z PROBE endstop, you must have a Z_PROBE_PIN defined in the pins.h file for your control board.
   // If you are using a servo based Z PROBE, you will need to enable NUM_SERVOS, SERVO_ENDSTOPS and SERVO_ENDSTOPS_ANGLES in the R/C Servo below.
   // RAMPS 1.3/1.4 boards may be able to use the 5V, Ground and the D32 pin in the Aux 4 section of the RAMPS board. Use 5V for powered sensors, otherwise connect to ground and D32
   // for normally closed configuration and 5V and D32 for normally open configurations. Normally closed configuration is advised and assumed.
diff --git a/Marlin/Marlin.h b/Marlin/Marlin.h
index 182540bbd5..55ed637f2c 100644
--- a/Marlin/Marlin.h
+++ b/Marlin/Marlin.h
@@ -227,7 +227,7 @@ void enquecommands_P(const char *cmd); //put one or many ASCII commands at the e
 void prepare_arc_move(char isclockwise);
 void clamp_to_software_endstops(float target[3]);
 
-void refresh_cmd_timeout(void);
+void refresh_cmd_timeout();
 
 #ifdef FAST_PWM_FAN
   void setPwmFrequency(uint8_t pin, int val);
diff --git a/Marlin/MarlinSerial.cpp b/Marlin/MarlinSerial.cpp
index fcba93256b..dc36e14c6c 100644
--- a/Marlin/MarlinSerial.cpp
+++ b/Marlin/MarlinSerial.cpp
@@ -287,7 +287,6 @@ MarlinSerial MSerial;
 #endif // !AT90USB
 
 // For AT90USB targets use the UART for BT interfacing
-#if defined(AT90USB) && defined (BTENABLED)
-   HardwareSerial bt;
+#if defined(AT90USB) && defined(BTENABLED)
+  HardwareSerial bt;
 #endif
-
diff --git a/Marlin/MarlinSerial.h b/Marlin/MarlinSerial.h
index b56880c23f..dbad3fd762 100644
--- a/Marlin/MarlinSerial.h
+++ b/Marlin/MarlinSerial.h
@@ -153,8 +153,8 @@ extern MarlinSerial MSerial;
 #endif // !AT90USB
 
 // Use the UART for BT in AT90USB configurations
-#if defined(AT90USB) && defined (BTENABLED)
-   extern HardwareSerial bt;
+#if defined(AT90USB) && defined(BTENABLED)
+  extern HardwareSerial bt;
 #endif
 
 #endif
diff --git a/Marlin/Marlin_main.cpp b/Marlin/Marlin_main.cpp
index d67f65367c..29ac686ef5 100644
--- a/Marlin/Marlin_main.cpp
+++ b/Marlin/Marlin_main.cpp
@@ -1009,6 +1009,8 @@ inline void sync_plan_position() {
     plan_set_position(delta[X_AXIS], delta[Y_AXIS], delta[Z_AXIS], current_position[E_AXIS]);
   }
 #endif
+inline void set_current_to_destination() { memcpy(current_position, destination, sizeof(current_position)); }
+inline void set_destination_to_current() { memcpy(destination, current_position, sizeof(destination)); }
 
 #ifdef ENABLE_AUTO_BED_LEVELING
 
@@ -1020,7 +1022,7 @@ inline void sync_plan_position() {
       refresh_cmd_timeout();
       calculate_delta(destination);
       plan_buffer_line(delta[X_AXIS], delta[Y_AXIS], delta[Z_AXIS], destination[E_AXIS], (feedrate/60)*(feedmultiply/100.0), active_extruder);
-      for (int i = 0; i < NUM_AXIS; i++) current_position[i] = destination[i];
+      set_current_to_destination();
     }
   #endif
 
@@ -1564,7 +1566,7 @@ static void homeaxis(int axis) {
 
     float oldFeedrate = feedrate;
 
-    for (int i = 0; i < NUM_AXIS; i++) destination[i] = current_position[i];
+    set_destination_to_current();
 
     if (retracting) {
 
@@ -1769,7 +1771,7 @@ inline void gcode_G28() {
 
   enable_endstops(true);
 
-  for (int i = 0; i < NUM_AXIS; i++) destination[i] = current_position[i]; // includes E_AXIS
+  set_destination_to_current();
 
   feedrate = 0.0;
 
@@ -1997,7 +1999,7 @@ inline void gcode_G28() {
     if (mbl_was_active) {
       current_position[X_AXIS] = mbl.get_x(0);
       current_position[Y_AXIS] = mbl.get_y(0);
-      for (int i = 0; i < NUM_AXIS; i++) destination[i] = current_position[i];
+      set_destination_to_current();
       feedrate = homing_feedrate[X_AXIS];
       line_to_destination();
       st_synchronize();
@@ -2776,13 +2778,13 @@ inline void gcode_M42() {
 
 #if defined(ENABLE_AUTO_BED_LEVELING) && defined(Z_PROBE_REPEATABILITY_TEST)
 
-  // This is redudant since the SanityCheck.h already checks for a valid Z_PROBE_PIN, but here for clarity.
+  // This is redundant since the SanityCheck.h already checks for a valid Z_PROBE_PIN, but here for clarity.
   #ifdef Z_PROBE_ENDSTOP
     #if !HAS_Z_PROBE
-      #error "You must have a Z_PROBE_PIN defined in order to enable calculation of Z-Probe repeatability."
+      #error You must define Z_PROBE_PIN to enable Z-Probe repeatability calculation.
     #endif
   #elif !HAS_Z_MIN
-    #error "You must have a Z_MIN_PIN defined in order to enable calculation of Z-Probe repeatability."
+    #error You must define Z_MIN_PIN to enable Z-Probe repeatability calculation.
   #endif
 
   /**
@@ -4613,7 +4615,7 @@ inline void gcode_T() {
     #if EXTRUDERS > 1
       if (tmp_extruder != active_extruder) {
         // Save current position to return to after applying extruder offset
-        memcpy(destination, current_position, sizeof(destination));
+        set_destination_to_current();
         #ifdef DUAL_X_CARRIAGE
           if (dual_x_carriage_mode == DXC_AUTO_PARK_MODE && Stopped == false &&
                 (delayed_move_time != 0 || current_position[X_AXIS] != x_home_pos(active_extruder))) {
@@ -5338,9 +5340,7 @@ void mesh_plan_buffer_line(float x, float y, float z, const float e, float feed_
 {
   if (!mbl.active) {
     plan_buffer_line(x, y, z, e, feed_rate, extruder);
-    for(int8_t i=0; i < NUM_AXIS; i++) {
-      current_position[i] = destination[i];
-    }
+    set_current_to_destination();
     return;
   }
   int pix = mbl.select_x_index(current_position[X_AXIS]);
@@ -5354,9 +5354,7 @@ void mesh_plan_buffer_line(float x, float y, float z, const float e, float feed_
   if (pix == ix && piy == iy) {
     // Start and end on same mesh square
     plan_buffer_line(x, y, z, e, feed_rate, extruder);
-    for(int8_t i=0; i < NUM_AXIS; i++) {
-      current_position[i] = destination[i];
-    }
+    set_current_to_destination();
     return;
   }
   float nx, ny, ne, normalized_dist;
@@ -5387,9 +5385,7 @@ void mesh_plan_buffer_line(float x, float y, float z, const float e, float feed_
   } else {
     // Already split on a border
     plan_buffer_line(x, y, z, e, feed_rate, extruder);
-    for(int8_t i=0; i < NUM_AXIS; i++) {
-      current_position[i] = destination[i];
-    }
+    set_current_to_destination();
     return;
   }
   // Do the split and look for more borders
@@ -5477,64 +5473,58 @@ void prepare_move() {
 
   #endif // DELTA
 
-#ifdef DUAL_X_CARRIAGE
-  if (active_extruder_parked)
-  {
-    if (dual_x_carriage_mode == DXC_DUPLICATION_MODE && active_extruder == 0)
-    {
-      // move duplicate extruder into correct duplication position.
-      plan_set_position(inactive_extruder_x_pos, current_position[Y_AXIS], current_position[Z_AXIS], current_position[E_AXIS]);
-      plan_buffer_line(current_position[X_AXIS] + duplicate_extruder_x_offset, current_position[Y_AXIS], current_position[Z_AXIS],
-          current_position[E_AXIS], max_feedrate[X_AXIS], 1);
-      sync_plan_position();
-      st_synchronize();
-      extruder_duplication_enabled = true;
-      active_extruder_parked = false;
-    }
-    else if (dual_x_carriage_mode == DXC_AUTO_PARK_MODE) // handle unparking of head
-    {
-      if (current_position[E_AXIS] == destination[E_AXIS])
-      {
-        // this is a travel move - skit it but keep track of current position (so that it can later
-        // be used as start of first non-travel move)
-        if (delayed_move_time != 0xFFFFFFFFUL)
-        {
-          memcpy(current_position, destination, sizeof(current_position));
-          if (destination[Z_AXIS] > raised_parked_position[Z_AXIS])
-            raised_parked_position[Z_AXIS] = destination[Z_AXIS];
-          delayed_move_time = millis();
-          return;
+  #ifdef DUAL_X_CARRIAGE
+    if (active_extruder_parked) {
+      if (dual_x_carriage_mode == DXC_DUPLICATION_MODE && active_extruder == 0) {
+        // move duplicate extruder into correct duplication position.
+        plan_set_position(inactive_extruder_x_pos, current_position[Y_AXIS], current_position[Z_AXIS], current_position[E_AXIS]);
+        plan_buffer_line(current_position[X_AXIS] + duplicate_extruder_x_offset, current_position[Y_AXIS], current_position[Z_AXIS],
+            current_position[E_AXIS], max_feedrate[X_AXIS], 1);
+        sync_plan_position();
+        st_synchronize();
+        extruder_duplication_enabled = true;
+        active_extruder_parked = false;
+      }
+      else if (dual_x_carriage_mode == DXC_AUTO_PARK_MODE) { // handle unparking of head
+        if (current_position[E_AXIS] == destination[E_AXIS]) {
+          // this is a travel move - skit it but keep track of current position (so that it can later
+          // be used as start of first non-travel move)
+          if (delayed_move_time != 0xFFFFFFFFUL) {
+            set_current_to_destination();
+            if (destination[Z_AXIS] > raised_parked_position[Z_AXIS])
+              raised_parked_position[Z_AXIS] = destination[Z_AXIS];
+            delayed_move_time = millis();
+            return;
+          }
         }
+        delayed_move_time = 0;
+        // unpark extruder: 1) raise, 2) move into starting XY position, 3) lower
+        plan_buffer_line(raised_parked_position[X_AXIS], raised_parked_position[Y_AXIS], raised_parked_position[Z_AXIS],    current_position[E_AXIS], max_feedrate[Z_AXIS], active_extruder);
+        plan_buffer_line(current_position[X_AXIS], current_position[Y_AXIS], raised_parked_position[Z_AXIS],
+            current_position[E_AXIS], min(max_feedrate[X_AXIS],max_feedrate[Y_AXIS]), active_extruder);
+        plan_buffer_line(current_position[X_AXIS], current_position[Y_AXIS], current_position[Z_AXIS],
+            current_position[E_AXIS], max_feedrate[Z_AXIS], active_extruder);
+        active_extruder_parked = false;
       }
-      delayed_move_time = 0;
-      // unpark extruder: 1) raise, 2) move into starting XY position, 3) lower
-      plan_buffer_line(raised_parked_position[X_AXIS], raised_parked_position[Y_AXIS], raised_parked_position[Z_AXIS],    current_position[E_AXIS], max_feedrate[Z_AXIS], active_extruder);
-      plan_buffer_line(current_position[X_AXIS], current_position[Y_AXIS], raised_parked_position[Z_AXIS],
-          current_position[E_AXIS], min(max_feedrate[X_AXIS],max_feedrate[Y_AXIS]), active_extruder);
-      plan_buffer_line(current_position[X_AXIS], current_position[Y_AXIS], current_position[Z_AXIS],
-          current_position[E_AXIS], max_feedrate[Z_AXIS], active_extruder);
-      active_extruder_parked = false;
     }
-  }
-#endif //DUAL_X_CARRIAGE
+  #endif // DUAL_X_CARRIAGE
 
-#if !defined(DELTA) && !defined(SCARA)
-  // Do not use feedmultiply for E or Z only moves
-  if( (current_position[X_AXIS] == destination [X_AXIS]) && (current_position[Y_AXIS] == destination [Y_AXIS])) {
-    line_to_destination();
-  } else {
-#ifdef MESH_BED_LEVELING
-    mesh_plan_buffer_line(destination[X_AXIS], destination[Y_AXIS], destination[Z_AXIS], destination[E_AXIS], (feedrate/60)*(feedmultiply/100.0), active_extruder);
-    return;
-#else
-    plan_buffer_line(destination[X_AXIS], destination[Y_AXIS], destination[Z_AXIS], destination[E_AXIS], (feedrate/60)*(feedmultiply/100.0), active_extruder);
-#endif  // MESH_BED_LEVELING
-  }
-#endif // !(DELTA || SCARA)
+  #if !defined(DELTA) && !defined(SCARA)
+    // Do not use feedmultiply for E or Z only moves
+    if ( (current_position[X_AXIS] == destination [X_AXIS]) && (current_position[Y_AXIS] == destination [Y_AXIS])) {
+      line_to_destination();
+    }
+    else {
+      #ifdef MESH_BED_LEVELING
+        mesh_plan_buffer_line(destination[X_AXIS], destination[Y_AXIS], destination[Z_AXIS], destination[E_AXIS], (feedrate/60)*(feedmultiply/100.0), active_extruder);
+        return;
+      #else
+        plan_buffer_line(destination[X_AXIS], destination[Y_AXIS], destination[Z_AXIS], destination[E_AXIS], (feedrate/60)*(feedmultiply/100.0), active_extruder);
+      #endif  // MESH_BED_LEVELING
+    }
+  #endif // !(DELTA || SCARA)
 
-  for(int8_t i=0; i < NUM_AXIS; i++) {
-    current_position[i] = destination[i];
-  }
+  set_current_to_destination();
 }
 
 void prepare_arc_move(char isclockwise) {
@@ -5546,9 +5536,7 @@ void prepare_arc_move(char isclockwise) {
   // As far as the parser is concerned, the position is now == target. In reality the
   // motion control system might still be processing the action and the real tool position
   // in any intermediate location.
-  for(int8_t i=0; i < NUM_AXIS; i++) {
-    current_position[i] = destination[i];
-  }
+  set_current_to_destination();
   refresh_cmd_timeout();
 }
 
@@ -5718,7 +5706,16 @@ void disable_all_steppers() {
 }
 
 /**
- * 
+ * Manage several activities:
+ *  - Check for Filament Runout
+ *  - Keep the command buffer full
+ *  - Check for maximum inactive time between commands
+ *  - Check for maximum inactive time between stepper commands
+ *  - Check if pin CHDK needs to go LOW
+ *  - Check for KILL button held down
+ *  - Check for HOME button held down
+ *  - Check if cooling fan needs to be switched on
+ *  - Check if an idle but hot extruder needs filament extruded (EXTRUDER_RUNOUT_PREVENT)
  */
 void manage_inactivity(bool ignore_stepper_queue/*=false*/) {
   
@@ -5737,7 +5734,7 @@ void manage_inactivity(bool ignore_stepper_queue/*=false*/) {
       && !ignore_stepper_queue && !blocks_queued())
     disable_all_steppers();
 
-  #ifdef CHDK //Check if pin should be set to LOW after M240 set it to HIGH
+  #ifdef CHDK // Check if pin should be set to LOW after M240 set it to HIGH
     if (chdkActive && ms > chdkHigh + CHDK_DELAY) {
       chdkActive = false;
       WRITE(CHDK, LOW);
@@ -5780,14 +5777,37 @@ void manage_inactivity(bool ignore_stepper_queue/*=false*/) {
   #endif
     
   #if HAS_CONTROLLERFAN
-    controllerFan(); //Check if fan should be turned on to cool stepper drivers down
+    controllerFan(); // Check if fan should be turned on to cool stepper drivers down
   #endif
 
   #ifdef EXTRUDER_RUNOUT_PREVENT
     if (ms > previous_millis_cmd + EXTRUDER_RUNOUT_SECONDS * 1000)
     if (degHotend(active_extruder) > EXTRUDER_RUNOUT_MINTEMP) {
-      bool oldstatus = E0_ENABLE_READ;
-      enable_e0();
+      bool oldstatus;
+      switch(active_extruder) {
+        case 0:
+          oldstatus = E0_ENABLE_READ;
+          enable_e0();
+          break;
+        #if EXTRUDERS > 1
+          case 1:
+            oldstatus = E1_ENABLE_READ;
+            enable_e1();
+            break;
+          #if EXTRUDERS > 2
+            case 2:
+              oldstatus = E2_ENABLE_READ;
+              enable_e2();
+              break;
+            #if EXTRUDERS > 3
+              case 3:
+                oldstatus = E3_ENABLE_READ;
+                enable_e3();
+                break;
+            #endif
+          #endif
+        #endif
+      }
       float oldepos = current_position[E_AXIS], oldedes = destination[E_AXIS];
       plan_buffer_line(destination[X_AXIS], destination[Y_AXIS], destination[Z_AXIS],
                       destination[E_AXIS] + EXTRUDER_RUNOUT_EXTRUDE * EXTRUDER_RUNOUT_ESTEPS / axis_steps_per_unit[E_AXIS],
@@ -5797,7 +5817,26 @@ void manage_inactivity(bool ignore_stepper_queue/*=false*/) {
       plan_set_e_position(oldepos);
       previous_millis_cmd = ms; // refresh_cmd_timeout()
       st_synchronize();
-      E0_ENABLE_WRITE(oldstatus);
+      switch(active_extruder) {
+        case 0:
+          E0_ENABLE_WRITE(oldstatus);
+          break;
+        #if EXTRUDERS > 1
+          case 1:
+            E1_ENABLE_WRITE(oldstatus);
+            break;
+          #if EXTRUDERS > 2
+            case 2:
+              E2_ENABLE_WRITE(oldstatus);
+              break;
+            #if EXTRUDERS > 3
+              case 3:
+                E3_ENABLE_WRITE(oldstatus);
+                break;
+            #endif
+          #endif
+        #endif
+      }
     }
   #endif
 
@@ -5806,7 +5845,7 @@ void manage_inactivity(bool ignore_stepper_queue/*=false*/) {
     if (delayed_move_time && ms > delayed_move_time + 1000 && !Stopped) {
       // travel moves have been received so enact them
       delayed_move_time = 0xFFFFFFFFUL; // force moves to be done
-      memcpy(destination, current_position, sizeof(destination));
+      set_destination_to_current();
       prepare_move();
     }
   #endif
diff --git a/Marlin/SanityCheck.h b/Marlin/SanityCheck.h
index c7552b9c0d..d92938c1d3 100644
--- a/Marlin/SanityCheck.h
+++ b/Marlin/SanityCheck.h
@@ -100,7 +100,7 @@
      * Require a Z Min pin
      */
     #if Z_MIN_PIN == -1
-      #if Z_PROBE_PIN == -1 || (! defined (Z_PROBE_ENDSTOP) || defined (DISABLE_Z_PROBE_ENDSTOP)) // It's possible for someone to set a pin for the Z Probe, but not enable it.
+      #if Z_PROBE_PIN == -1 || (!defined(Z_PROBE_ENDSTOP) || defined(DISABLE_Z_PROBE_ENDSTOP)) // It's possible for someone to set a pin for the Z Probe, but not enable it.
         #ifdef Z_PROBE_REPEATABILITY_TEST
           #error You must have a Z_MIN or Z_PROBE endstop to enable Z_PROBE_REPEATABILITY_TEST.
         #else
diff --git a/Marlin/Servo.h b/Marlin/Servo.h
index bbdf6bf0ab..682a3b3798 100644
--- a/Marlin/Servo.h
+++ b/Marlin/Servo.h
@@ -123,7 +123,7 @@ class Servo {
     int read();                        // returns current pulse width as an angle between 0 and 180 degrees
     int readMicroseconds();            // returns current pulse width in microseconds for this servo (was read_us() in first release)
     bool attached();                   // return true if this servo is attached, otherwise false
-    #if defined (ENABLE_AUTO_BED_LEVELING) && (PROBE_SERVO_DEACTIVATION_DELAY > 0)
+    #if defined(ENABLE_AUTO_BED_LEVELING) && PROBE_SERVO_DEACTIVATION_DELAY > 0
       int pin;                           // store the hardware pin of the servo
     #endif
   private:
diff --git a/Marlin/configurator/config/Configuration.h b/Marlin/configurator/config/Configuration.h
index ca0b2d0791..5b0960fdd4 100644
--- a/Marlin/configurator/config/Configuration.h
+++ b/Marlin/configurator/config/Configuration.h
@@ -523,7 +523,7 @@ const bool Z_MAX_ENDSTOP_INVERTING = false; // set to true to invert the logic o
   // If you would like to use both a Z PROBE and a Z MIN endstop together or just a Z PROBE with a custom pin, uncomment #define Z_PROBE_ENDSTOP and read the instructions below.
   // If you want to still use the Z min endstop for homing, disable Z_SAFE_HOMING above. Eg; to park the head outside the bed area when homing with G28.
   // WARNING: The Z MIN endstop will need to set properly as it would without a Z PROBE to prevent head crashes and premature stopping during a print.
-  // To use a separte Z PROBE endstop, you must have a Z_PROBE_PIN defined in the pins.h file for your control board.
+  // To use a separate Z PROBE endstop, you must have a Z_PROBE_PIN defined in the pins.h file for your control board.
   // If you are using a servo based Z PROBE, you will need to enable NUM_SERVOS, SERVO_ENDSTOPS and SERVO_ENDSTOPS_ANGLES in the R/C Servo below.
   // RAMPS 1.3/1.4 boards may be able to use the 5V, Ground and the D32 pin in the Aux 4 section of the RAMPS board. Use 5V for powered sensors, otherwise connect to ground and D32
   // for normally closed configuration and 5V and D32 for normally open configurations. Normally closed configuration is advised and assumed.
diff --git a/Marlin/example_configurations/Felix/Configuration.h b/Marlin/example_configurations/Felix/Configuration.h
index dfd79a0d97..72d716989b 100644
--- a/Marlin/example_configurations/Felix/Configuration.h
+++ b/Marlin/example_configurations/Felix/Configuration.h
@@ -473,7 +473,7 @@ const bool Z_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of
   // If you would like to use both a Z PROBE and a Z MIN endstop together or just a Z PROBE with a custom pin, uncomment #define Z_PROBE_ENDSTOP and read the instructions below.
   // If you want to still use the Z min endstop for homing, disable Z_SAFE_HOMING above. Eg; to park the head outside the bed area when homing with G28.
   // WARNING: The Z MIN endstop will need to set properly as it would without a Z PROBE to prevent head crashes and premature stopping during a print.
-  // To use a separte Z PROBE endstop, you must have a Z_PROBE_PIN defined in the pins.h file for your control board.
+  // To use a separate Z PROBE endstop, you must have a Z_PROBE_PIN defined in the pins.h file for your control board.
   // If you are using a servo based Z PROBE, you will need to enable NUM_SERVOS, SERVO_ENDSTOPS and SERVO_ENDSTOPS_ANGLES in the R/C Servo below.
   // RAMPS 1.3/1.4 boards may be able to use the 5V, Ground and the D32 pin in the Aux 4 section of the RAMPS board. Use 5V for powered sensors, otherwise connect to ground and D32
   // for normally closed configuration and 5V and D32 for normally open configurations. Normally closed configuration is advised and assumed.
diff --git a/Marlin/example_configurations/Felix/Configuration_DUAL.h b/Marlin/example_configurations/Felix/Configuration_DUAL.h
index 98dea404bf..e6683b4e81 100644
--- a/Marlin/example_configurations/Felix/Configuration_DUAL.h
+++ b/Marlin/example_configurations/Felix/Configuration_DUAL.h
@@ -473,7 +473,7 @@ const bool Z_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of
   // If you would like to use both a Z PROBE and a Z MIN endstop together or just a Z PROBE with a custom pin, uncomment #define Z_PROBE_ENDSTOP and read the instructions below.
   // If you want to still use the Z min endstop for homing, disable Z_SAFE_HOMING above. Eg; to park the head outside the bed area when homing with G28.
   // WARNING: The Z MIN endstop will need to set properly as it would without a Z PROBE to prevent head crashes and premature stopping during a print.
-  // To use a separte Z PROBE endstop, you must have a Z_PROBE_PIN defined in the pins.h file for your control board.
+  // To use a separate Z PROBE endstop, you must have a Z_PROBE_PIN defined in the pins.h file for your control board.
   // If you are using a servo based Z PROBE, you will need to enable NUM_SERVOS, SERVO_ENDSTOPS and SERVO_ENDSTOPS_ANGLES in the R/C Servo below.
   // RAMPS 1.3/1.4 boards may be able to use the 5V, Ground and the D32 pin in the Aux 4 section of the RAMPS board. Use 5V for powered sensors, otherwise connect to ground and D32
   // for normally closed configuration and 5V and D32 for normally open configurations. Normally closed configuration is advised and assumed.
diff --git a/Marlin/example_configurations/Hephestos/Configuration.h b/Marlin/example_configurations/Hephestos/Configuration.h
index 7eceefb986..ac101be4d3 100644
--- a/Marlin/example_configurations/Hephestos/Configuration.h
+++ b/Marlin/example_configurations/Hephestos/Configuration.h
@@ -496,7 +496,7 @@ const bool Z_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of
   // If you would like to use both a Z PROBE and a Z MIN endstop together or just a Z PROBE with a custom pin, uncomment #define Z_PROBE_ENDSTOP and read the instructions below.
   // If you want to still use the Z min endstop for homing, disable Z_SAFE_HOMING above. Eg; to park the head outside the bed area when homing with G28.
   // WARNING: The Z MIN endstop will need to set properly as it would without a Z PROBE to prevent head crashes and premature stopping during a print.
-  // To use a separte Z PROBE endstop, you must have a Z_PROBE_PIN defined in the pins.h file for your control board.
+  // To use a separate Z PROBE endstop, you must have a Z_PROBE_PIN defined in the pins.h file for your control board.
   // If you are using a servo based Z PROBE, you will need to enable NUM_SERVOS, SERVO_ENDSTOPS and SERVO_ENDSTOPS_ANGLES in the R/C Servo below.
   // RAMPS 1.3/1.4 boards may be able to use the 5V, Ground and the D32 pin in the Aux 4 section of the RAMPS board. Use 5V for powered sensors, otherwise connect to ground and D32
   // for normally closed configuration and 5V and D32 for normally open configurations. Normally closed configuration is advised and assumed.
diff --git a/Marlin/example_configurations/K8200/Configuration.h b/Marlin/example_configurations/K8200/Configuration.h
index 3a6aea9b1d..6d743e9379 100644
--- a/Marlin/example_configurations/K8200/Configuration.h
+++ b/Marlin/example_configurations/K8200/Configuration.h
@@ -501,7 +501,7 @@ const bool Z_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of
   // If you would like to use both a Z PROBE and a Z MIN endstop together or just a Z PROBE with a custom pin, uncomment #define Z_PROBE_ENDSTOP and read the instructions below.
   // If you want to still use the Z min endstop for homing, disable Z_SAFE_HOMING above. Eg; to park the head outside the bed area when homing with G28.
   // WARNING: The Z MIN endstop will need to set properly as it would without a Z PROBE to prevent head crashes and premature stopping during a print.
-  // To use a separte Z PROBE endstop, you must have a Z_PROBE_PIN defined in the pins.h file for your control board.
+  // To use a separate Z PROBE endstop, you must have a Z_PROBE_PIN defined in the pins.h file for your control board.
   // If you are using a servo based Z PROBE, you will need to enable NUM_SERVOS, SERVO_ENDSTOPS and SERVO_ENDSTOPS_ANGLES in the R/C Servo below.
   // RAMPS 1.3/1.4 boards may be able to use the 5V, Ground and the D32 pin in the Aux 4 section of the RAMPS board. Use 5V for powered sensors, otherwise connect to ground and D32
   // for normally closed configuration and 5V and D32 for normally open configurations. Normally closed configuration is advised and assumed.
diff --git a/Marlin/example_configurations/SCARA/Configuration.h b/Marlin/example_configurations/SCARA/Configuration.h
index 2616f155fd..f126ab99bc 100644
--- a/Marlin/example_configurations/SCARA/Configuration.h
+++ b/Marlin/example_configurations/SCARA/Configuration.h
@@ -525,7 +525,7 @@ const bool Z_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of
   // If you would like to use both a Z PROBE and a Z MIN endstop together or just a Z PROBE with a custom pin, uncomment #define Z_PROBE_ENDSTOP and read the instructions below.
   // If you want to still use the Z min endstop for homing, disable Z_SAFE_HOMING above. Eg; to park the head outside the bed area when homing with G28.
   // WARNING: The Z MIN endstop will need to set properly as it would without a Z PROBE to prevent head crashes and premature stopping during a print.
-  // To use a separte Z PROBE endstop, you must have a Z_PROBE_PIN defined in the pins.h file for your control board.
+  // To use a separate Z PROBE endstop, you must have a Z_PROBE_PIN defined in the pins.h file for your control board.
   // If you are using a servo based Z PROBE, you will need to enable NUM_SERVOS, SERVO_ENDSTOPS and SERVO_ENDSTOPS_ANGLES in the R/C Servo below.
   // RAMPS 1.3/1.4 boards may be able to use the 5V, Ground and the D32 pin in the Aux 4 section of the RAMPS board. Use 5V for powered sensors, otherwise connect to ground and D32
   // for normally closed configuration and 5V and D32 for normally open configurations. Normally closed configuration is advised and assumed.
diff --git a/Marlin/example_configurations/WITBOX/Configuration.h b/Marlin/example_configurations/WITBOX/Configuration.h
index d7d32d0881..265f73fce1 100644
--- a/Marlin/example_configurations/WITBOX/Configuration.h
+++ b/Marlin/example_configurations/WITBOX/Configuration.h
@@ -495,7 +495,7 @@ const bool Z_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of
   // If you would like to use both a Z PROBE and a Z MIN endstop together or just a Z PROBE with a custom pin, uncomment #define Z_PROBE_ENDSTOP and read the instructions below.
   // If you want to still use the Z min endstop for homing, disable Z_SAFE_HOMING above. Eg; to park the head outside the bed area when homing with G28.
   // WARNING: The Z MIN endstop will need to set properly as it would without a Z PROBE to prevent head crashes and premature stopping during a print.
-  // To use a separte Z PROBE endstop, you must have a Z_PROBE_PIN defined in the pins.h file for your control board.
+  // To use a separate Z PROBE endstop, you must have a Z_PROBE_PIN defined in the pins.h file for your control board.
   // If you are using a servo based Z PROBE, you will need to enable NUM_SERVOS, SERVO_ENDSTOPS and SERVO_ENDSTOPS_ANGLES in the R/C Servo below.
   // RAMPS 1.3/1.4 boards may be able to use the 5V, Ground and the D32 pin in the Aux 4 section of the RAMPS board. Use 5V for powered sensors, otherwise connect to ground and D32
   // for normally closed configuration and 5V and D32 for normally open configurations. Normally closed configuration is advised and assumed.
diff --git a/Marlin/example_configurations/delta/generic/Configuration.h b/Marlin/example_configurations/delta/generic/Configuration.h
index ac13788b22..3218d2d9d7 100644
--- a/Marlin/example_configurations/delta/generic/Configuration.h
+++ b/Marlin/example_configurations/delta/generic/Configuration.h
@@ -541,7 +541,7 @@ const bool Z_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of
   // If you would like to use both a Z PROBE and a Z MIN endstop together or just a Z PROBE with a custom pin, uncomment #define Z_PROBE_ENDSTOP and read the instructions below.
   // If you want to still use the Z min endstop for homing, disable Z_SAFE_HOMING above. Eg; to park the head outside the bed area when homing with G28.
   // WARNING: The Z MIN endstop will need to set properly as it would without a Z PROBE to prevent head crashes and premature stopping during a print.
-  // To use a separte Z PROBE endstop, you must have a Z_PROBE_PIN defined in the pins.h file for your control board.
+  // To use a separate Z PROBE endstop, you must have a Z_PROBE_PIN defined in the pins.h file for your control board.
   // If you are using a servo based Z PROBE, you will need to enable NUM_SERVOS, SERVO_ENDSTOPS and SERVO_ENDSTOPS_ANGLES in the R/C Servo below.
   // RAMPS 1.3/1.4 boards may be able to use the 5V, Ground and the D32 pin in the Aux 4 section of the RAMPS board. Use 5V for powered sensors, otherwise connect to ground and D32
   // for normally closed configuration and 5V and D32 for normally open configurations. Normally closed configuration is advised and assumed.
diff --git a/Marlin/example_configurations/delta/kossel_mini/Configuration.h b/Marlin/example_configurations/delta/kossel_mini/Configuration.h
index 38f5023552..489dca6d58 100644
--- a/Marlin/example_configurations/delta/kossel_mini/Configuration.h
+++ b/Marlin/example_configurations/delta/kossel_mini/Configuration.h
@@ -545,7 +545,7 @@ const bool Z_MAX_ENDSTOP_INVERTING = false; // set to true to invert the logic o
   // If you would like to use both a Z PROBE and a Z MIN endstop together or just a Z PROBE with a custom pin, uncomment #define Z_PROBE_ENDSTOP and read the instructions below.
   // If you want to still use the Z min endstop for homing, disable Z_SAFE_HOMING above. Eg; to park the head outside the bed area when homing with G28.
   // WARNING: The Z MIN endstop will need to set properly as it would without a Z PROBE to prevent head crashes and premature stopping during a print.
-  // To use a separte Z PROBE endstop, you must have a Z_PROBE_PIN defined in the pins.h file for your control board.
+  // To use a separate Z PROBE endstop, you must have a Z_PROBE_PIN defined in the pins.h file for your control board.
   // If you are using a servo based Z PROBE, you will need to enable NUM_SERVOS, SERVO_ENDSTOPS and SERVO_ENDSTOPS_ANGLES in the R/C Servo below.
   // RAMPS 1.3/1.4 boards may be able to use the 5V, Ground and the D32 pin in the Aux 4 section of the RAMPS board. Use 5V for powered sensors, otherwise connect to ground and D32
   // for normally closed configuration and 5V and D32 for normally open configurations. Normally closed configuration is advised and assumed.
diff --git a/Marlin/example_configurations/makibox/Configuration.h b/Marlin/example_configurations/makibox/Configuration.h
index 24c3e5b4d8..45350960f8 100644
--- a/Marlin/example_configurations/makibox/Configuration.h
+++ b/Marlin/example_configurations/makibox/Configuration.h
@@ -493,7 +493,7 @@ const bool Z_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of
   // If you would like to use both a Z PROBE and a Z MIN endstop together or just a Z PROBE with a custom pin, uncomment #define Z_PROBE_ENDSTOP and read the instructions below.
   // If you want to still use the Z min endstop for homing, disable Z_SAFE_HOMING above. Eg; to park the head outside the bed area when homing with G28.
   // WARNING: The Z MIN endstop will need to set properly as it would without a Z PROBE to prevent head crashes and premature stopping during a print.
-  // To use a separte Z PROBE endstop, you must have a Z_PROBE_PIN defined in the pins.h file for your control board.
+  // To use a separate Z PROBE endstop, you must have a Z_PROBE_PIN defined in the pins.h file for your control board.
   // If you are using a servo based Z PROBE, you will need to enable NUM_SERVOS, SERVO_ENDSTOPS and SERVO_ENDSTOPS_ANGLES in the R/C Servo below.
   // RAMPS 1.3/1.4 boards may be able to use the 5V, Ground and the D32 pin in the Aux 4 section of the RAMPS board. Use 5V for powered sensors, otherwise connect to ground and D32
   // for normally closed configuration and 5V and D32 for normally open configurations. Normally closed configuration is advised and assumed.
diff --git a/Marlin/example_configurations/tvrrug/Round2/Configuration.h b/Marlin/example_configurations/tvrrug/Round2/Configuration.h
index 649046b880..2c98a310fb 100644
--- a/Marlin/example_configurations/tvrrug/Round2/Configuration.h
+++ b/Marlin/example_configurations/tvrrug/Round2/Configuration.h
@@ -495,7 +495,7 @@ const bool Z_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of
   // If you would like to use both a Z PROBE and a Z MIN endstop together or just a Z PROBE with a custom pin, uncomment #define Z_PROBE_ENDSTOP and read the instructions below.
   // If you want to still use the Z min endstop for homing, disable Z_SAFE_HOMING above. Eg; to park the head outside the bed area when homing with G28.
   // WARNING: The Z MIN endstop will need to set properly as it would without a Z PROBE to prevent head crashes and premature stopping during a print.
-  // To use a separte Z PROBE endstop, you must have a Z_PROBE_PIN defined in the pins.h file for your control board.
+  // To use a separate Z PROBE endstop, you must have a Z_PROBE_PIN defined in the pins.h file for your control board.
   // If you are using a servo based Z PROBE, you will need to enable NUM_SERVOS, SERVO_ENDSTOPS and SERVO_ENDSTOPS_ANGLES in the R/C Servo below.
   // RAMPS 1.3/1.4 boards may be able to use the 5V, Ground and the D32 pin in the Aux 4 section of the RAMPS board. Use 5V for powered sensors, otherwise connect to ground and D32
   // for normally closed configuration and 5V and D32 for normally open configurations. Normally closed configuration is advised and assumed.
diff --git a/Marlin/fastio.h b/Marlin/fastio.h
index 3087e87f2a..0e3b34d255 100644
--- a/Marlin/fastio.h
+++ b/Marlin/fastio.h
@@ -91,7 +91,7 @@
 	added as necessary or if I feel like it- not a comprehensive list!
 */
 
-#if defined (__AVR_ATmega168__) || defined (__AVR_ATmega328__) || defined (__AVR_ATmega328P__)
+#if defined(__AVR_ATmega168__) || defined(__AVR_ATmega328__) || defined(__AVR_ATmega328P__)
 // UART
 #define	RXD					DIO0
 #define	TXD					DIO1
@@ -426,7 +426,7 @@ pins
 #define PD7_PWM			NULL
 #endif	/*	_AVR_ATmega{168,328,328P}__ */
 
-#if defined (__AVR_ATmega644__) || defined (__AVR_ATmega644P__) || defined (__AVR_ATmega644PA__) || defined (__AVR_ATmega1284P__)
+#if defined(__AVR_ATmega644__) || defined(__AVR_ATmega644P__) || defined(__AVR_ATmega644PA__) || defined(__AVR_ATmega1284P__)
 // UART
 #define	RXD					DIO8
 #define	TXD					DIO9
@@ -929,7 +929,7 @@ pins
 #define PD7_PWM			OCR2A
 #endif	/*	_AVR_ATmega{644,644P,644PA}__ */
 
-#if defined (__AVR_ATmega1280__) || defined (__AVR_ATmega2560__)
+#if defined(__AVR_ATmega1280__) || defined(__AVR_ATmega2560__)
 // UART
 #define	RXD					DIO0
 #define	TXD					DIO1
@@ -2024,7 +2024,7 @@ pins
 
 #endif
 
-#if defined (__AVR_AT90USB1287__) || defined (__AVR_AT90USB1286__) || defined (__AVR_AT90USB646__) || defined(__AVR_AT90USB647__)
+#if defined(__AVR_AT90USB1287__) || defined(__AVR_AT90USB1286__) || defined(__AVR_AT90USB646__) || defined(__AVR_AT90USB647__)
 // SPI
 #define	SCK					DIO9
 #define	MISO				DIO11
@@ -3322,7 +3322,7 @@ Teensy   28 29 30 31 32 33 34 35 20 21 22 23 24 25 26 27 10 11 12 13 14 15 16 17
 #endif // __AVR_AT90usbxxx__
 
 
-#if defined (__AVR_ATmega1281__) || defined (__AVR_ATmega2561__)
+#if defined(__AVR_ATmega1281__) || defined(__AVR_ATmega2561__)
 // UART
 #define	RXD					DIO0
 #define	TXD					DIO1
diff --git a/Marlin/pins.h b/Marlin/pins.h
index 0d63298869..e5af0af179 100644
--- a/Marlin/pins.h
+++ b/Marlin/pins.h
@@ -187,7 +187,7 @@
   #define Z_MIN_PIN          -1
 #endif
 
-#if defined (DISABLE_Z_PROBE_ENDSTOP) || ! defined (Z_PROBE_ENDSTOP) // Allow code to compile regardless of Z_PROBE_ENDSTOP setting.
+#if defined(DISABLE_Z_PROBE_ENDSTOP) || !defined(Z_PROBE_ENDSTOP) // Allow code to compile regardless of Z_PROBE_ENDSTOP setting.
   #define Z_PROBE_PIN        -1
 #endif
 
@@ -220,8 +220,11 @@
   #define Z_MIN_PIN          -1
 #endif
 
-#define SENSITIVE_PINS { 0, 1, X_STEP_PIN, X_DIR_PIN, X_ENABLE_PIN, X_MIN_PIN, X_MAX_PIN, Y_STEP_PIN, Y_DIR_PIN, Y_ENABLE_PIN, Y_MIN_PIN, Y_MAX_PIN, Z_STEP_PIN, Z_DIR_PIN, Z_ENABLE_PIN, Z_MIN_PIN, Z_MAX_PIN, Z_PROBE_PIN, PS_ON_PIN, \
-                        HEATER_BED_PIN, FAN_PIN, \
+#define SENSITIVE_PINS { 0, 1, \
+                        X_STEP_PIN, X_DIR_PIN, X_ENABLE_PIN, X_MIN_PIN, X_MAX_PIN, \
+                        Y_STEP_PIN, Y_DIR_PIN, Y_ENABLE_PIN, Y_MIN_PIN, Y_MAX_PIN, \
+                        Z_STEP_PIN, Z_DIR_PIN, Z_ENABLE_PIN, Z_MIN_PIN, Z_MAX_PIN, Z_PROBE_PIN, \
+                        PS_ON_PIN, HEATER_BED_PIN, FAN_PIN, \
                         _E0_PINS _E1_PINS _E2_PINS _E3_PINS \
                         analogInputToDigitalPin(TEMP_BED_PIN) \
                        }
diff --git a/Marlin/pins_RAMPS_13.h b/Marlin/pins_RAMPS_13.h
index 11ecddeda2..2708117d04 100644
--- a/Marlin/pins_RAMPS_13.h
+++ b/Marlin/pins_RAMPS_13.h
@@ -62,12 +62,12 @@
   #define FILWIDTH_PIN        5
 #endif
 
-#if defined(Z_PROBE_ENDSTOP)
+#ifdef Z_PROBE_ENDSTOP
   // Define a pin to use as the signal pin on Arduino for the Z_PROBE endstop.
- #define Z_PROBE_PIN 32
+  #define Z_PROBE_PIN 32
 #endif
 
-#if defined(FILAMENT_RUNOUT_SENSOR)
+#ifdef FILAMENT_RUNOUT_SENSOR
   // define digital pin 4 for the filament runout sensor. Use the RAMPS 1.4 digital input 4 on the servos connector
   #define FILRUNOUT_PIN        4
 #endif