OBERHEIM SYNTH

thanks for the comments all around.  there's not much to say about this synth...a friend 
bought it non-working a few years back, intending to get it fixed...it's huge and taking up 
space in our rehearsal room, we need money and are opting to sell rather than fix.

here's a general techie question, since people are asking about the voice cards... i can't get 
the damn screws off of the cards to take them out and see which of them (if any) work or 
don't work.  

is there any good trick to loosen the screws without potentially damaging the voice cards?