I, on the same evening, upgraded to a C3D board and updated the software version. My laser got all out of whack, couldnt position right, homing was screwed up and I could understand why. Racked my brain for two days trying to figure out where the problem was, either it was the new board or the software. Deleted the updated version, reinstalled v20 and bam, now it’s fine. I hope my experiences help a few good cutters out there.