Several years back I bought a Silvertone 1474 that works great. With it came this extra chassis. I pulled it out of the basement in hopes to start my first amp restoration project. After taking a look a little closer, two things are apparent to me. This circuit is different than the working amp in some minor ways, and it appears someone has not only been in this chassis before to add three pronged cord and replace caps, but also modded some things. Unless the I'm completely missing the caps in the schematic that run from input jacks to V1? Well, I'm missing at less one OT. Not sure if the other is any good or what the specs are on these. I suppose I should test the PT too... Do I replace all the iron? Can I test the PT without power? Also best method for cleaning knobs and chassis? Any pointers from the pros would be more than welcome. What order of business do you usually approach something like this?