Hi @phaedrux . I'm seeing the same error, using the same commands (M671+G30), but this response is confusing to me. The documentation for mesh compensation specifically references the auto calibration routine for mutli-motor bed leveling as a prerequisite to setting up mesh compensation, and this makes sense to me, because I'd want to insure the individual z motors are at the optimal relative heights before measuring the mesh, so that the errors to be compensated for are as small as possible. If the M671+G30 auto-cal is no longer allowed to auto-adjust multiple z-motors, how is this accomplished now?