I don't do as much auto stuff as I used to. Lack of a garage space living in the city probably has a lot to do with that.
Lots of maintenance type work as to plumbing, electrical, painting, tiling, refinishing. Repairing appliances, ect. Helped build a couple of houses when I was younger.
I haven't done any audio work on a car in a long time, but used to enjoy installing stereo systems. That interest shifted to home theatre. Nothing elaborate, I tend to go for the most bang for a buck.
Even though more of a systems person now, my favorite part of the work is troubleshooting and repairing PC's, Servers, Printers, etc. It's nice when those opportunities come up.
And for Bamboo, I've yet to meet an ISTP that didn't take at least a year or two or three off from college. Comes with the territory. And for whatever reason? It tend to work out in the long run surprisingly good.