P 3 says do a 3x3 grid. V4 is the maximum verbose level for G29. T gives a topographical map of the probed bed.
May I suggest you start a similar thread at GitHub.com/MarlinFirmware/Marlin ? I know there were some Core-XY AutoBed issues with RC4 and I have a hunch you will get quicker answers over there.
May I suggest you start a similar thread at GitHub.com/MarlinFirmware/Marlin ? I know there were some Core-XY AutoBed issues with RC4 and I have a hunch you will get quicker answers over there.