Geeetech I3 Pro B DEFAULT_AXIS_STEPS_PER_UNIT options (#13896)

config/examples/Geeetech/Prusa i3 Pro B/bltouch/Configuration.h

  * Override with M92
  *                                      X, Y, Z, E0 [, E1[, E2[, E3[, E4[, E5]]]]]
  */
-#define DEFAULT_AXIS_STEPS_PER_UNIT   { 78.74, 78.74, 2560, 105 }
+#define PRO_B_WITH_LEADSCREW
+#if ENABLED(PRO_B_WITH_LEADSCREW)       // M8 leadscrew version
+  #define DEFAULT_AXIS_STEPS_PER_UNIT   { 78.74, 78.74, 400, 105 }
+#else                                   // M8 threaded rod version
+  #define DEFAULT_AXIS_STEPS_PER_UNIT   { 78.74, 78.74, 2560, 105 }
+#endif
 
 /**
  * Default Max Feed Rate (mm/s)

config/examples/Geeetech/Prusa i3 Pro B/noprobe/Configuration.h

  * Override with M92
  *                                      X, Y, Z, E0 [, E1[, E2[, E3[, E4[, E5]]]]]
  */
-#define DEFAULT_AXIS_STEPS_PER_UNIT   { 78.74, 78.74, 2560, 105 }
+#define PRO_B_WITH_LEADSCREW
+#if ENABLED(PRO_B_WITH_LEADSCREW)       // M8 leadscrew version
+  #define DEFAULT_AXIS_STEPS_PER_UNIT   { 78.74, 78.74, 400, 105 }
+#else                                   // M8 threaded rod version
+  #define DEFAULT_AXIS_STEPS_PER_UNIT   { 78.74, 78.74, 2560, 105 }
+#endif
 
 /**
  * Default Max Feed Rate (mm/s)