To piggyback on the OP's question, I've never really understood how standard the shutter mountings are. If I get a good lens in a bad shutter, can I be basically assured of being able to just unscrew it and stick it on a good example of the same shutter? What about the same size but different brands (Compur 1 vs. Copal 1, or whatever)? What about going from a barrel to a shutter?

Yes, these are remedial questions, but I'm a pretty remedial-level LF shooter!