Quoted from slochar:There's actually a cheat for replacing the switch caps as well, you cut the old one off near the body and now you have a nice lead there you can bend into a loop, bend your new cap's leads into a similar loop, and interlock them for soldering.
I did something similar when i lost the displays on Night Rider, which are controlled by 4 diodes on the rectifier board. I identified the bad one, but rather than try to de-solder the 40+ year old component, I snipped the legs at the diode itself and soldered the new legs to the old. Worked like a charm and no risk of lifting traces etc.... Technically probably a hack, but I'll take it.