I have done the same, Mike, with my 4x5 Korona, which someone had apparently tried to carry on the end of a tripod (as Art would say, "it wasn't me!"). This caused a) the shearing off of the factory brass hardware, and subsequently b) the sale of the camera to me, in very rickety condition as you can imagine. And, I suppose c) my refurbishment of same (which entailed a lot of joinery) with the addition of the installation of a modern T-nut from the hardware store - the same size as mentioned above. Works like a champ by the way. If you need a longer barrel,you can get them from Rockler Woodworking (online). I found the standard length to work quite well.
- Randy