Another thought - the camera has no value and you said you enjoyed working on it.
Although it was my living I always found camera repair therapeutic until my eyes & fingers grew old. Loved the work in fact.
Maybe you would too? If you're good the returns are excellent.
Most people don't have the patience or method to succeed but you seem to have potential!
BTW I did at the time wonder whether a vibrating table or container for the solvent might work...but stripping & rebuilding a shutter isn't that hard and I could then offer my usual guarantee with confidence.
Good luck.