Have a few questions that I can't seem to get answered anywhere else. Hopefully I can explain this well enough. I think that's why I'm running into confusion. I have a Warwick Thumb 5 Neckthrough that I plan on ordering a new preamp and pickups for this week. I've decided on the Augilar OBP-3 and the Seymour Duncan Basslines Quarter Pounders (SJ5-3). My questions are these: 1) Will the SD's fit in the Thumb with no problem? 2) After looking on-line I can't figure out which configuration of the Aguilar pre I should get. Available options are on this site: http://www.bestbassgear.com/aguilar-obp3-preamp.htm. I'm assuming I should order the stacked basic kit, but I really have no idea. In desparate need of guidance here, haha. Thanks guys!