I visited my Jerzy Drozd this past weekend and fell in love, all over again! What a wonderful bass! Anyway...currently, the bass is the exact same bass I've shown pictures of (and would post again, but don't see the need), except that before shipping it from Spain, Jerzy added 3 switches: a 3-position mid-selector and 2 coil-taps, one for each pickup. I asked Dan Lenard, of Luthiers Access Group, if an active/passive push-pull can be added to the volume control. The short of it is, in this particular case, no. The alternative he suggested is to make one of the coil-taps operate both pickups instead of each switch operating a single pickup. Then, the other switch can be made active-passive. I've never had a bass with coil taps or active/passive. Any suggestions on which I should choose?