If I'm installing new pickups in my bass and a Bartolini NTMB preamp outboard from the bass do I need to alter the pot values for volume and tone to allow for there being two lots of volume and tone controls? if so, to what? Current specs: NTMB Bass, treble, mid pots are 50k linear Vol 25K audio and blend dual 250k 5a5c taper. (blend will be on the bass not the pre) Note: I want the bass to sound the same or as close as possible to having the above pots and bart preamp inside it. the intended setup on the bass thus far will be 2 x soap bar dual coil pickups, 2 x 4 way pickup selectors, 1 series parallel switch, vbt pots - values yet to be determined (could maybe skip the tone knob and get it all done on the outboard pre). I intend to use this outboard pre with a 250 k loaded p bass and whatever is in a standard Marcus Miller iv and musicman stingray 4h so I might need to alter things for those scenarios also but mainly interested in the above example. So, what say you?