I've had too many amps come through my hands over the past couple of years. I have a 200C now. Hence me looking around and finding this post. I haven't measured rail voltage, but I did check the caps. They all measure around 16,500 mfd each and are 75volt parts, no signs of leaking. I may replace them soon, but they sure look good. I've been considering replacing a few of the small electrolytic on the boards. I figure that I'll replace filter caps at that time. I'm a speaker guy and don't claim to know much about amps, but I'm thinking "why not" on some parts changes. This amp already sounds WAAAAY above its price point.