OK now. I own a Roger Waters P-Bass and I want to transform it into a P/J, with the jazz pickup in the early 60's position and I'm really worried about finding a good match between the two pickups. The existing pickup is a Seymour Duncan SPB-3. My concern goes with the Jazz pickup. What I really want is a classic passive pickup that can produce the warm and funky tones the jazz bass is known for, without losing any head on the slap section! AND-most important- I don't want to stumble into any problems e.g. the j-pup being louder than the p one or the two pickups being out of phase. Also (this may help with your possible suggestions), I'm planning on installing stacked knobs so that the pickups have different tone controls. So if any of you here have any suggestions on which j pickup I should use to get the results I want please post them!! Thnx a lot n rock on!!!