I bought brand new Seymour Duncan P/J lightning rod active pickups on ebay, they go for dirt cheap??? well got them, they are nice, but they come with a battery clip but no pots, can I use the ones currently in my passive bass??? also I see the wiring diagram for the p and the j but what about the p and j together?? Also if I can't use the stock pots which can I use for vol-vol-ton, also do I need a .022 cap (will .02 work) and do I need a stereo output jack?? Thanks. when i got them they are new, but wrapped in palstic not SD retail package.