Yamaha CS80

Hi guys,

At this point I'm considering having my two machines properly restored. 
Right now I'm about to recieve a few parts from Kent (he's repaired the 
ribbon with a new spring and a voiceboard of my 50), but I want them to 
be (at least technically) in tip top shape. (given the low number of 
80's around, I don't see myself owning one of those anytime soon, and I 
refuse to have these plucked for spare parts. If anything my 50 would be 
the spares for the 60, but I prefer to have 'm both in top shape). If 
everything goes well with the repaired parts from kent, neither would 
have any defects at all.

I read about people replacing the caps on their powersupplys, wich makes 
sense and doesn't sound to be too complex. This might be something I 
would like to do myself pretty soon.  Also, I've read a bit about the 
decoupling stuff, but I'm not quite sure if it's something also for the 
50/60. In short:

What would be good to replace?  I don't think anything has been replaced 
yet on either of them, so it's all very old. Is there some list of 
things that would be good to do? (Oil filter, belts, tires, etc.. ;-)).

Thanks :)

J