diff --git a/Marlin/src/module/stepper.cpp b/Marlin/src/module/stepper.cpp
index ef2098feee..49002e3e04 100644
--- a/Marlin/src/module/stepper.cpp
+++ b/Marlin/src/module/stepper.cpp
@@ -279,7 +279,10 @@ int8_t Stepper::count_direction[NUM_AXIS] = { 0, 0, 0, 0 };
   #define X_APPLY_DIR(v,ALWAYS) \
     if (extruder_duplication_enabled || ALWAYS) { \
       X_DIR_WRITE(v); \
-      X2_DIR_WRITE(v); \
+      if (scaled_duplication_mode) \
+        X2_DIR_WRITE(!v); \
+      else \
+        X2_DIR_WRITE(v); \
     } \
     else { \
       if (movement_extruder()) X2_DIR_WRITE(v); else X_DIR_WRITE(v); \
diff --git a/Marlin/src/pins/pins_FORMBOT_TREX3.h b/Marlin/src/pins/pins_FORMBOT_TREX3.h
index dde947e3a6..9caa157d39 100644
--- a/Marlin/src/pins/pins_FORMBOT_TREX3.h
+++ b/Marlin/src/pins/pins_FORMBOT_TREX3.h
@@ -131,7 +131,7 @@
 #define FAN1_PIN           12
 
 #define NUM_RUNOUT_SENSORS  2
-#define FIL_RUNOUT_PIN     23
+#define FIL_RUNOUT_PIN     22
 #define FIL_RUNOUT2_PIN    21
 
 //