Does anyone have any experience with the Ampeg VT-22 Combo? I just picked up one (with assistance. . .it's a heavy b*$tard!) that needs some work; non-working reverb, no speakers and a loud hum when plugged into an external cab. It was only $140 so worst case I can gut it and use the working parts to start a 18-watt TMB project that I've been considering.