OK guys! Barrel removal is a snap... The rosin was just the ticket and my receiver wrench is work'en great... so, now I try to screw in an original barrel from another receiver, aaaannnndddd, it actually hits / bottoms out, on the receiver at / on, the breech face end of the barrel, leaving the flange about half a turn out...???....
... Is this abnormal, un-usual, or just beginners luck!
..... Best to all, til...lat'r...GT