[tyingq]

I imagine soldering with tremors is doable with some sort of flexible arm set up to hold the soldering iron. Something like this: https://www.fullcompass.com/prod/541073-aladdin-eye-lite-cla...

I did a lot of soldering as a microwave tech, and used a setup like that just for convenience. I have to have a magnifying glass on a similar flex arm because my eyes are so bad. I suppose there are still some hard parts, like trying to use braid to remove solder, but I bet you can do it.

I have a 1991 Mitsubishi Galant VR4 that has a place in my heart that your Subaru seems to have. Cool family compact with 4WD and 500 oversized, at the wheels, turbo HP.