Good afternoon,
I know you're looking for troubleshooting ideas, not necessarily a gun smith. But since you axed for "ideas", here's what I would do.
My suggestion, based on my own experience, is to send it to Galazan, too.
I've tried others and regretted my decision.
Worse, I learned that there is nothing as sour as paying for a do-over to on bad work from a dork who shouldn't have even attempted to undertake work they told you they could do--and then failed. You wonder if you're even going to get ol' Bessie back up and around.
Have no fear: Galazan stands behind their work. I found that others stand behind their locked door when you come back with a question--or worse yet, outright problems with their work.
What will this be worth to you?
Once, I didn't know any better--now I do. Therefore I wouldn't send it anywhere else if I were in your position.
Share an image of the gun, I'd love to see it, no matter what it's condition.
BB