I think the issues are beneath the plates.
It's going to cost money to find out.
I'd beg for a test firing if no disassembly is possible.
The right lock plate may have cracked off, and was welded. Its missing engraving, and no longer fits nicely. Couple that with an axle out of alignment and you you will have to spend money.
Part of me says that the journey to resurrection is worth the price of admission. If that makes any sense.
I still think it's a beautiful gun. It certainly needs less than the Hussey written about in SSM.