I need a new or at least nonabused faceplate.I looked around on teh web doing the usual searches and came up short... Second, I have read about replacing the paper capacitors- is this necessesary? Third, what is the easiest way to check bias voltage? I assume that the trimpot between the two transformers controls bias (any tricks of the trade?) Fourth, Tubes: I want a clean, clear sound with full even harmonics and a 'sweet crunch': I will be using the amp for keyboards and guitar. What are your favorite cheap combinations. The speakers are stock, but I will probably experiment.

Thanks in advance!