As much as I'd like to do this myself, I need expert help with my early 1980's Fender amps. Time for a check-up, grid screen resistors (or whatever they're called), bias pot addition, etc. YEars ago I worked with this fantastic tech at Torres Guitars when they were on Big Basin Way in Saratoga, but Torres - and the tech?- have since moved to San Mateo. This tech was incredible, and knew how to get the sound I wanted out of my Twin. So long ago. If anyone has his contact info that would be great! If you can offer favorite Fender amp tech's contact info, that would be great also!