Wow. This is very scary. Reminds me of a bad experience with a Jet 1440 lathe gearbox that required months to sort out. I was completely mystified, but the shop hired a pro and he had the gearbox entirely out on the table in parts. It was very annoying and everybody was always asking when the lathe was ever going to get fixed. It eventually got fixed, but I didn't find out what was the root problem. After that, I bought a South Bend 9 with a broken back gear. Enough of that complicated stuff. I love the South Bend, but it is a chore to swap change gears. I bought a 9A at a liquidation sale, but the gearbox was jammed. The same sale had a full set of change gears, and I'm off and running. Watching a Blondihacks video on YouTube talking about how a new import machine was so much better of a purchase than used, as well as this thread, really brought the painful Jet experience back to the top. Anyway, some happy news. The South Bend just cut an odd fine thread for my missing Champion forge blower locknut. It worked perfectly at a demo.