I thought everything on a 50s Brit bike was made of unobtainium.
I'm thinking I'll let it sit for a while and work on some other parts. While I work on those other parts, I'll decide what to do about the gearbox. I'm checking ebay, but if I'm ready to come back to the gearbox before I find a replacement, I'll work more on fixing it myself. That being said, I believe the case is aluminum. If I were going to fix it myself, what would my options be, as far as welding, brazing, or something else? Some things to consider... I don't mind the rod being permanently attached to the gearbox case, unless someone knows of a good reason why it shouldn't. Second thing is that I have an implanted defibrillator so I can't use an arc welder. It would have to be a flame. I've never welded, so whatever I do, I'll be doing a lot of practice on scrap metal before I bring a torch anywhere near my gearbox. From what I've been reading, it seems that because of the case and rod being dissimilar metals, welding them to each other would be out. So would brazing be strong/heat-resistant enough to hold them together? How hot does a gearbox get? I also like the idea of not melting the existing metal. I know I'm being stubborn and possibly unreasonable about fixing it myself, but I think that's kind of a common trait on this forum, isn't it?