I need to not turn this into a habit: basically got no time in the shop this weekend. I did manage to glue and trim the rest of the clamp pieces:

Then, yesterday, I was at an estate sale and ran across this guy:

It’s a C/G concertina made by Stagi in Italy. I got it for $10 (they sell for several hundred) because it wouldn’t make any sound despite the fact that the bellows moved fine. 10 minutes of inspection at home revealed the problem: it was probably left in a hot place at some point and all the valves were glued shut. An hour of work later, it was playing fine. It has quite a nice voice.
Okay, okay, I am going to go back to making the violin.