Thinking about it, I've had two relatively minor recurring issues with the car.
One is the side dump exhaust with the megaphone cracking and falling off. I fixed that with beefier welds and better rubber mounting.
The other is failing alternators. I think I've mentioned it before. In one of my last races, the nut came off the alternator mounting bolt, and I lost the 10/12mm shouldered bolt. Must have been because of all the mounting and dismounting of failed alternators, and I probably under-torqued it last time. Anyway, by mid race, the alternator was hanging on by the tensioner. No alternator means no water pump. Discovered it when my radiator boiled over in a race and my temp needle got pegged. Luckily caught it before lasting damage was done. Luckily, @justcallmefred
had a spare to loan me, and I was able to finish the weekend. Thanks again, Fred!
That bolt is a little tricky. It's 12mm through the engine bracket, then narrows down to 10mm for the alernator. And because of my setup with the mini alternator and oversized (underdrive) pulley, it can't be too long or it will grind against the pulley. I had to make one to replace the one I lost. If I'm going through the trouble to make a bolt, especially a big one, then by now you can guess how I'm going to it. Grade 5 titanium. If I'm making one, I might as well have two. Finally got around to doing it. Here's the process once again, starting with a couple of very nice longer-than-needed bolts, that needed to be shortened, then turned down and threaded on a lathe. Then finished by hand: