I'm building a bass inspired by Carl Radle's modified Telecaster Bass from the late`60's which has a split coil P-Bass pickup where the original single coil pickup would be mounted, and a single coil a couple of inches closer to the bridge. At this point I'm figuring on a single volume and tone control operating both pickups simultaneously, as my cyber-friend Dan Howard has done on his bass (I can post a picture if anyone would like). My question is this: How matched are the outputs of the SD pickups I'd be using for this bass, or maybe better phrased, can I get vintage tone pickups that would be of similar output? Would the whole issue be resolved by using one concentric volume knob and a common tone? What are the advantages/disadvantages of concentric knobs for both volume and tone? Thanks for any advice or suggestions.