Gentlemen, thank you for the info. Lot to digest! I need to re-read it again.
I've been really interested in the Tisas, but wasn't sure if any gunsmiths would work on them. Good to hear that Dave Salyers will.
I didn't mention it, but I squirrelled away a S&W 67 for each child, and have been looking for a good gunsmith. I heard that there is a good one in AZ, and I need to do some work down there soon, so maybe I'll drop the revolvers off in person.
I was under the same impression until Dave told me the metallurgy on the Tisas is very good.