I'm not sure if you're aware but the push button switches are a known weak point on these units. I had to replace one on my reverb unit and I think one on my RG-2 Dynamic Range Expander of the same generation. It sounds like yours are working fine so far. Cool!
Have you started working on it? What are your thoughts?
It looks pretty cool but you have to be judicious with with the settings as it's not hard to go overboard with the reverb effect.
Thanks! I'm very happy with this receiver. It has really curbed my thirst for buying more receivers. I picked it up for $600. The protection circuit would randomly engage. Turned out to be a bad zener diode on the protection board. After the repair I did a full recap and replaced known faulty transistors. It sounds amazing to my ears. It is rated at 85w/ch which is way more than I ever use.