Thanks, Larry. I "know" that, but must have slipped a cog - so much for all those gold stars!!!

I think M-21's are soldered (no idea if they have some silver content from the factory).

I once had a Liege SXS fail a small portion of the braze near the muzzle. I didn't, at the time realize I could solder it for a fix, and I was not about to try to remelt the braze. It sold before I really had to come up with a solution.