I suppose I'll start a thread for each of these 3 shotguns so we don't get confused.
the barrel I was talking about above with slightly overclocked extension I think is an easy fix. with it of, I can feel the ridge of pushed up metal on the shoulder with my thumb. I think if I just lightly peen it back down, it'll snug up perfect. I say this after feeling how "tight" the damaged extension was on the other 97 that came in when I took it off last night. No trouble at all.