I'm trying to find some info/advice on installing an Aguilar OBP-3 into a custom Warmoth Jazz w/ a traditional 3 knob control plate. I'm really not wanting to modify the guitar body at all, so just one 9 volt will have to suffice. Any combo of concentric pots/switches (e.g. j-retro style) is cool, provided they all fit on the control plate. Oh, and the preamp should drive both pickups (Nordstrand NJ4SE's). My main concern is how it will affect "passive" operation. Will the volume/tone pots function normally or at all? I know the j-retro has some limitations there, which is why I'm leaning toward the aggie. I've tried to contact bestbassgear.com and Aguilar on this, but no response yet. Thanks!