I want to make my new vortex cartos into metal cartos. I had the thought that I could use the metal tubes off of my old Boge cartos, so I set about trying to remove the end from a Boge and after much pinching, prying, heating, freezing, and even a little oiling, I have a tube with the threading end still in it minus the threads and a pair of bent plyers. There has to be a better way. I don't really want to cut the tubes off because I want them to be as long as possible, and still fit my PCC. So I either need a better way to remove that part, or to just buy the tubes somewhere. At this point I'd almost rather just buy the tubes, but if there's some secret to getting the tube free of the threads, I'd appreciate knowing it. So does anyone carry the metal tubes for 510 cartos? Or maybe Home Depot carries the proper size of tube? Any help on this would be greatly appreciated.