Hi new here, I have a couple of Seymour Duncan pickups off of a old Ibanez, Im not sure if the came on it or were added, anyway one has a "JB" sticker and the other has a "DC"....they still list the specs for the DC,( all black) i believe its a TB-5? and they recommend it in the bridge position....does anyone know about the JB pickup? I think before when they still listed it, they recommended it in the bridge position too? I plan on using them on a epiphone LP-100 which one would you use where? Thanks