[sdiy] Gibson G101

[John Henson]

I've just had delivery for repair one of these.
It had just been shipped in from the States allegedly after a complete 
overhaul, but it's casing is damaged, loads of screws are missing and it 
doesn't work.
Mind you, the cardboard shipping carton that it was in was perfectly ok.
My question is, to what extent should I replace the electrolytic caps in it, 
there are lots of them.
My own instincts are that all PSU caps should be replaced as they get the 
hardest time, followed by the main decoupling caps on each PCB, but the grey 
area is the interstage, biasing and decoupling around the small components. 
In my experience, they tend to be fine no matter what age they are, and my 
only nemeses are Tantalums. You can get faulty caps in any age of equipment, 
and they can be a b***ch to isolate, but you know something is wrong.
This is a rare and classic instrument, so I want to do no harm to borrow the 
medical analogy, and ripping out 25 or so pcb's, all hardwired together, 
would be risky.
Any thoughts?

John