Bill, I'll be glad to check it over for you. I have a 1943 "T" in my personal collection that's ZF because the body is worn in the bolt runway. It was last rebuilt in 1954-55 and has had four telescopes fitted during it's service career. It can still be fired with care but I don't anymore as I have others that are still in spec to draw from. Remember that the No.4T was in service well into the 1970's. Rifles with problems like yours and mine were culled and surplused onto the civilian market when they failed MoD inspection. I wouldn't dare tear it apart and rebuild it with your other barreled action. It still has historical significance and that would be destroyed if you do that. Collectors aren't the Army and it's doubtful that the kind of service we're giving them will ever hurt them, (or us). Chances are it's still safe to fire as long as it's checked out properly and the problem isolated beforehand. Brian