I'm planning on changing-out my Bartolini pre-amp for a different one. I'm still going to keep the Bartolini SoapBars that are in the bass right now. The Knobs are currently config'd: Volume, p/up Blend, Mid-range, (Stacked) Treble (top) and Bass (on Bottom). *Do I usually get New Pots with the purchase of a New Pre Amp? *Or, can I usually config the pre-amp to the current knob set-up?... And just buy the pre-amp. ++I currently have 18v in the bass at the moment, the previous owner modified it... I don't like the job that he did, but the Bass is great otherwise.++ Unfortunately the only Pre-amp's that I have tried, have been in other basses. I've Tried Aguilars in a couple Sadowsky 4 stringers, Demeter in some custom-job bass and Bartolini (18v.) as the current set up, with my Warrior Soldier 5. I really liked the Aguilar (I think that it was a OB-1 or 3), I'm not electronic-savvy enough to distinguish if that pre-amp is do'able in my bass... with least amount of mess, with the current knob set-up. Any thought's or Suggestions? Has anybody changed their own Pre-amp? Let me know.