Hardware question regarding coin and headstock door locks. A few years ago I disassembled my KISS (Bally) to rock tumble all the parts. However, since that my coin door lock mechanism doesn't "hold" position with key in. Usually, the locks have that "click" and stay in a closed position with the key in the lock but I'm finding that if I have the key all the way in the lock, the position will turn/sag without any resistance or the click. When I pull the key out just a bit or key out completely the lock works as it should. I'm wondering if I'm missing a part of the mechanism after the rock tumbling I did or what would cause that.