You may (or may not) be interested in some issues
I've had with my
Commodore PET. It's certainly educated me about the vunerablility of old
sockets.
It may sounds crazy, but when I have something rare as a PET and want to
keep it WORKING for a long time, I usually change **all** sockets and put
sockets on socketless ICs. Of course, with proper dessoldering tool :)