Hi, about to pull the trigger on a JC60 must be late 70s / early 80s. The boards look pretty old school but well put together. Obviously particular items switches etc specifically Roland but just wondering if these old amps circuits are still serviceable with everyday components (resistors, caps, Diodes, IC's, generic transformers etc). I live overseas in a fairly remote area and would have access to an ok electronics guy, but would have very little / zero access to specialized Roland parts. I have always wanted a JC and this one is cheap as chips and relatively good condition. So if the worst comes to the worst I won't kill myself if I had to bin it but would fell better knowing it was somewhat repairable in the future.