flash marlin to the latest, other wise the g29 code for bedleveling dosent exist. Install the sensor into the z axis limit (splicing it) Set the z axis offset to 0.1 after running. All home. Then the probe functions as the endstop. Getting the servo installed might take some more creativity running power to it from the fan power. Not that I like necro posting but I hve the same board.by Hellswarm - Prusa i3 and variants