I'm heading out this afternoon to pick up one of these bad boys. A real 1974 SA212 50w combo. I played through it for about 15 minutes yesterday with my SG Classic and, well, you can probably guess how good it sounded. I've never owned a piece of gear this old, so I've got a few questions about it. What can I expect in terms of maintenance on an amp like this? The guy mentioned that it'll need a re-cap at some point. How much is that going to run me? This particular amp has newish Greenbacks instead of the original Fanes. How much volume and clean headroom am I giving up with the GBs? The only 'quirk' the amp has is that you have to sometimes turn the standby and power switch on at the same time to get the amp to power on. What could be causing this, and is it something that I will need to address? Thanks!