[morzh]

I am lucky my chassis only had the electrolytics replaced.

As for the resistors, well, it depends. Though I myself do not make the dog-bones, I am OK with them where the dissipation is small; I am not sure how these would take anything about 1/2W and up, considering they are embedded in plastic. The overmolded with epoxy and mineral filler, that someone here at some point showed, are probably good to stand up to heat, but that is not something I typically would do.

I usually measure the resistors, and when I see them under 10% deviation I leave them in without any remorse: if they did not change much in 70-80 years, they are not likely to do so within the rest of my lifetime, which is likely not going to be very long anyway.
Also what I do sometimes, if a resistor 20-30% up (as what most dog-bones are), and the dissipation is not high, I will parallel a resistor to bring it to almost exact value and hide it under (which is easy - modern resistors up to 1W are fairly small and are barely if at all seen under a large dog-bone one).

I will show it on photos when I am done.