Hi, I upgraded my printer, an Anycubic I3 Mega S by adding the original bltouch v3.1. I use the 2 endstop Z and not the bltouch for the z-home. At each firmware upload I execute: loading default values M500 turn the printer off and on again This is what I did: I load the Firmware, configured with the attached files, with the z-offset at 0. I calculate the Z offeset with one of the many proceby Spugno - Firmware - Marlin