Hi everyone, my question is the following. I own a yamaha bb614 bass which is a PJ basically. even though i consider the sound to be great i still want to improve it and now i find myself with a dilemma. the pickups that i'm considering are Seymour Duncan spb-3, bartolini 8cbp and fender's original p-bass. the pickup i wanna change is the precision one but the place where the pickups go seems to big kind of bigger than the pickup i wanna buy. i printed seymour duncan's diagram and, while the magnets themselves are the same size, the pickup as a whole is smaller than the one i already use. so the question is, will it fit either way? or is it that my bass cannot get its pickups changed?