Hello all. I just picked up an epipone eb-3 and i was wondering if the pole pieces are adjustable since they are flathead screws. have asked many of the clowns at various guitar stores about these types of pickups and have gotten many different answers ranging from to tell which way to put the pickups in. or "don't do that it will mess up the polarity." im pretty sure thats not true. so is it just to fine tune the pickup height.