How exactly is the wheel calibrated when what it is pointing to on the playfield doesn't match with what it reads on the DMD in test mode? In the manual, it says to rotate it in the opposite direction one full revolution when you move the wheel manually. I do that, exit the test, then re-enter test. It then lands on another item that still doesn't match, maybe closer than before, maybe not. I had it match once, exited, then re-tested and it was wrong again. Seems just random. Since this game is on 1.2, I'll update to 1.3 and see how that goes.

So it either knows where it is, or it needs to be cleaned or is faulty. No setting it to a zero point or other recalibration function. Got it.

Edit: this issue was fixed by replacing the $25 wheel opto board.