I'm going to hit a couple of forums with this question, but hoping there is a local solution from my local (Salem) forum. I discovered that I've lost the "safety click ball" (safety detent ball), probably when I replaced the original with a metal slide. Or maybe later from lack of lube or free movement. I never use the safety so don't know when it went missing. Anyway, I'm looking for information on the size of the ball bearing used and whether there are local handy sources for a replacement.