I don't have any fresh ideas. I think you have a pretty good idea what you could be capable of. You should have a much better idea than I do.
The only thing I might suggest is to run some Match ammunition through it just to remove the possible incompatible ammo question.
I did that with my old Winchester after I cleaned it and got a major surprise. It turned in the best groups it has fired in the nearly 60 years I have owned it.