Long story short, I have a 78 P-Bass I've owned since 1981. I first added a passive bridge pickup (Seymour Duncan Quarter Pounder), then about 10 yrs ago replaced the passive pickups with an EMG P/J set. I recently acquired another active bass and so now I would like to revert my P-Bass to passive with the P and J pickups that were in it before. First, has anyone else here done this before and is there anything I should know about? Second, a specific question... in my current active configuration the three knobs are: neck volume / bridge volume / "Afterburner" gain knob that was installed with the EMG set. When I go back to passive should I have the three knobs be: Neck volume / bridge volume / tone or Master volume / pickup blend / tone Thanks in advance.