I know not to get into a double action Colt. @dfariswheel has explained in many posts about the complexity of the inner workings of a Colt Double action and I have no interest in trying to 'noodle' them out. Even though there aren't many Colt gunsmiths, there are a few. If I can find a 32 S&W Long cylinder it'll go to Frank for fitting and I'll just have to take the chance that it hasn't been butchered. I am only looking at cylinders that appear to have the original finish on them. Mostly what I have seen that are likely candidates are well worn finish wise. As long as no one has refinished it (and over polished it in the process) I'm just going to have to take a chance knowing that it may not work.Even though the parts may be the same size, fitting may be required. You can just take a rebound lever out of one Colt and expect it to work in another EVEN if they're both the same type of Colt.
I got into tinkering S&W Double Action revolvers only because I didn't think there were any S&W DA gunsmiths around. That and they really aren't that difficult to understand. But even then, I'm really a 'parts swapper' rather than a smith of any sort.