the ampeg comp on the PF500s...anyone use this? I've always been a plug and play, even now just getting used to a gain dial. the manual says it evens out your signal. does compression effect your tone to you guys ears? What settings are you guys using for the comp? mine has always been on 0. gain at 2 o'clock the rest around middle w master? I've never had to go past 12 o'clock. W the Class D adjustments we've all had to make (protection circuit cut out) can you really drill your E string w your thumb with this thing on? would it help in that respect? I've always had old stuff, and this is still uncharted territory for me. and boy oh boy, am I getting it bad for a SVT 7 started w a 350, then a 500 now I want a 7. I want that tube in there.