MakerGear M2 moving Z Endstop to the Bottom and OctoPrint

My M2 was shipped with firmware M2Marlin24r2. For updating to firmware M2E-Production-SnNRd-V100 I have taken the following steps:

1. Change Configuration.h.:
Line #326: #define INVERT_Z_DIR true // For MakerGear M2, black Z motor, leave "false"; for older black and silver Z motor, set to "true"
Line #345: #define Z_MAX_POS 195 // secure distance to the platform
Line #486: #define DEFAULT_AXIS_STEPS_PER_UNIT {88.88,88.88,400,471.5} // The steps of the old silver Z Motor.

2. Upd