Excellent news, I was installing another tumbler (or trying) and broke the brass bushing that the lock turns inside. It might be time to put this thing down for a while. The only thing I can think of is maybe getting a short piece of tubing with an OD the same as the ID of the hole that the lock assembly fits into. I could notch it at the rear to keep the tumbler from going all of the way in, and I could even cut a path for the tumbler pins to fall into when locked for removal of the key.