Recently acquired two 800s, a 1050 drive and a 410 cassette. Right now it's pretty much chucked into a flea market box as purchased-but I'd like to get these re-capped, refreshed and scrubbed up. One is missing a few keys and I'm hopeful I can get at least one of them working for a good shakedown to see what the fuss was about. After I dabble with them for a bit, I'll probably pass them on to somebody who will give it a good home. In the meantime, it will be fun to explore and experience the 'dark side'...'the others'... the ones we sparred with in epic flame wars on long forgotten BBS's back in the day

I blame Jan Beta for the inspiration.
I've got three original PSUs that all pass the multimeter test-which I assume is a good sign. However, past experience has taught me that PSUs really need some warm up and loading to give them a good shakedown.
My question for this audience is simple: Is there a substantial risk in plugging in an old PSU (like the magic smoke of a C64 from a failed PSU)? Or are these things just generally hardy-less some crusty old caps?
Any other warnings before proceeding to the temples of the enemy territory for this weary old C64 and Amiga guy?
Thanks for any advice!
Toast