#define X_MAX_LENGTH 297

When I upload a configuration.h file, it looks like it works fine, all the defs look like they have values.  There are a lot of differences when I compare the two files.  For example, my #define USER_

so do I still do this part? /* Z-Probing */#define FEATURE_Z_PROBE true

#define FEATURE_AUTOLEVEL 1

#define ENDSTOP_Z_BACK_ON_HOME 30

#define EXT0_TEMPSENSOR_TYPE 102

#define LAZY_DUAL_X_AXIS 1

#define ALTERNATIVE_JERK

#define MM_PER_ARC_SEGMENT 1

#define ENDSTOP_PULLUP_X_MIN true

#define ENDSTOP_PULLUP_X_MAX false

#define NUM_EXTRUDER 2

#define DEBUG_QUEUE_MOVE

#define ENDSTOPPULLUPS // Comment this out (using // at the start of the line) to disable the endstop pullup resistors

The original config has CARRIAGE_HORIZONTAL_OFFSET and END_EFFECTOR_HORIZONTAL_OFFSET which compute #define ROD_RADIUS (PRINTER_RADIUS-END_EFFECTOR_HORIZONTAL_OFFSET-CARRIAGE_HORIZONTAL_OFFSET)

That is so new it is not officially part of any config. That is why you have to add #define FAST_COREXYZ

#define DELTA_DIAGONAL_ROD 345 

you can detail how to disable the double steps, I have not found this parameter memory #define FAST_COREXYZ

Figured it out: The 're-homing' step, after the filament was loaded, was bugging me.  So I went back into the configuration tool:  In the features tab under the "Filament Change" section, I

#define SDSUPPORT 1