Use the slower feedrate for XY axes

Marlin/Marlin_main.cpp

@@ -3806,13 +3806,13 @@ inline void gcode_M206() {
    * M666: Set delta endstop adjustment
    */
   inline void gcode_M666() {
-    for (int8_t i = 0; i < 3; i++) {
+    for (int8_t i = X_AXIS; i <= Z_AXIS; i++) {
       if (code_seen(axis_codes[i])) {
         endstop_adj[i] = code_value();
       }
     }
   }
-#elif defined(Z_DUAL_ENDSTOPS)
+#elif defined(Z_DUAL_ENDSTOPS) // !DELTA && defined(Z_DUAL_ENDSTOPS)
   /**
    * M666: For Z Dual Endstop setup, set z axis offset to the z2 axis.
    */
@@ -3822,7 +3822,7 @@ inline void gcode_M206() {
     SERIAL_EOL;
   }
   
-#endif // DELTA
+#endif // !DELTA && defined(Z_DUAL_ENDSTOPS)
 
 #ifdef FWRETRACT
 

Marlin/ultralcd.cpp

@@ -1831,7 +1831,7 @@ char *ftostr52(const float &x) {
           if (iy & 1) ix = (MESH_NUM_X_POINTS - 1) - ix; // Zig zag
           current_position[X_AXIS] = mbl.get_x(ix);
           current_position[Y_AXIS] = mbl.get_y(iy);
-          line_to_current(X_AXIS);
+          line_to_current(manual_feedrate[X_AXIS] <= manual_feedrate[Y_AXIS] ? X_AXIS : Y_AXIS);
           lcdDrawUpdate = 2;
         }
       }
@@ -1848,7 +1848,7 @@ char *ftostr52(const float &x) {
       plan_set_position(current_position[X_AXIS], current_position[Y_AXIS], current_position[Z_AXIS], current_position[E_AXIS]);
       current_position[X_AXIS] = MESH_MIN_X;
       current_position[Y_AXIS] = MESH_MIN_Y;
-      line_to_current(X_AXIS);
+      line_to_current(manual_feedrate[X_AXIS] <= manual_feedrate[Y_AXIS] ? X_AXIS : Y_AXIS);
       _lcd_level_bed_position = 0;
       lcd_goto_menu(_lcd_level_bed);
     }