Modern MRiscoC/Marlin bugfix branches versus a SKR Mini E3 v3 & Microprobe v2

Starting this thread as I work through getting an up-to-date bugfix Marlin implementation running on my not-very-Ender 3v2.

After getting the probe successfully operational on my Creality 4.2.2 board ( https://github.com/bigtreetech/MicroProbe/issues/14 ), I've hit a roadblock where Linear Advance is sending the extruder stepper catatonic mid-print. LA is so vital to exceptional print quality I've decided to upgrade the control board to a SKR Mini E3 V3.0 to bypass the issue entirely ... and I don't feel like taking a soldering iron to my Creality board ... yet anyway.

Using the latest source from MRiscoC Professional Firmware (20240122) https://github.com/mriscoc/Ender3V2S1

The first real issue I encountered when working my way through the manual pages which seem relevant to my setup (pages 20, 21 & 22) is this: Z_MIN_PROBE_ENDSTOP_INVERTING

It does not appear to exist in the 2.1.x bugfix branch of Marlin that MRiscoC is based upon.

For my 422 configuration, I've used "Z_MIN_ENDSTOP_HIT_STATE" & "Z_MIN_PROBE_ENDSTOP_HIT_STATE" to work around the issue there. Guess I'll have to see if it works here. Still have a couple of days before the postie rocks up with my new E3 board...