The remaining code should be compatible. But I#d wait for new hardware until HAL design is finished. I still plan to switch SPI handling to SPI library, maybe using a HAL proxy to make it easy to rep

The probe to y=-5 phenomena is a feature of having the X & Y homing position at 999999 (or what is #defined in the code as IGNORE_COORDINATE) - as soon as I set the X & Y homing positions to 0

#define Z_PROBE_PIN ORIG_Z_MIN_PIN

1_ Modify pins.h and add "#define <Extruder>_ORIG_Z_MAX_PIN  19” to the Azteeg X3 Pro section. I have four extruders, so I did #define  EXT1_ORIG_Z_MAX_PIN 19" 

#define DELTA_DIAGONAL_ROD 352 // 350.00 // 355.87 // 249.57 081818 // mm

For reference, here's how the sensor is hooked up. Looks right to me... With #define ORIG_Z_MAX_PIN 19 set in pins.h, I should be seeing some messages in the printer log (full debug enabled) - but not

#define HOMING_ORDER HOME_ORDER_ZYX

#define DRV_TMC2130

#define EXT1_JAM_PIN ORIG_Z_MAX_PIN

#define ALWAYS_CHECK_ENDSTOPS 0

#define Z_PROBE_HEIGHT 0

#define Z_PROBE_HEIGHT 0

#define ALWAYS_CHECK_ENDSTOPS 0

did you try to Change #define Z_MIN_POS 0

#define CONFIGURATION_H

    <rectangle color="#dddddd" xMax="210" xMin="0" yMax="210" yMin="0"/>

#define ORIG_E1_STEP_PIN    43

it´s quite simple, in configuration.h you see a lot of #define  and values.

#define ENDSTOP_PULLUP_Z_MIN false

#define UI_HAS_KEYS 1