#define ENDSTOP_PULLUP_X_MIN true

#define KNOWN_BOARD 1

ie #define EXT0_DECOUPLE_TEST_PERIOD 12000

#define EXT0_DECOUPLE_TEST_PERIOD 12000

Z offset is the be dcoating method, you should prevent. I meant#define Z_PROBE_HEIGHT 22

#define Z_PROBE_Z_OFFSET 0

#define FAN_PIN -1

#define FAN_PIN -1

#define KNOWN_BOARD 1

Hm, something wrong. I have chosen X MIN PIN (#define LASER_PIN ORIG_X_MIN_PIN). I can indicate 5 Volts, but no enough current, 80 mA only (required 700mA). As you understood, laser wont work at such

#define UI_ENCODER_CLICK 37

#define ENDSTOP_Z_BACK_ON_HOME 0

#define CUSTOM_EVENTS

Correction:with the following setting the extruder stepper locks up#define EXT0_ENABLE_ON 0 

#define EXT0_X_OFFSET 0

#define ENDSTOP_PULLUP_X_MIN true

#define SERIAL_PORT 3

#define CONFIGURATION_H

#define ZHOME_X_POS 130

#define ENDSTOP_Z_BACK_ON_HOME 0