Actually, what I did was worse. I was installing a rear lock bolt which had not yet been cut to length, forgetting that it comes out the front of the plate behind the hammer when it is in the down position. The pressure from the uncut bolt pressing against the back of the hammer broke the square portion of the tumbler right at the plate. Stupid inattentive mistake on my part. Given that the plate and internals have already been inlet, the only option is to have a replacement tumbler installed. Looks like that’s not going to happen until at least the new year as Chambers is closed for the holidays until 1/2/20. It is a Chambers Colonial VA lock, although I got it from another vendor as part of a precarve kit. Hopefully, Chambers will still be willing to install a new one for me for a fee if I send it to them.
Jay