I've got an old JB in my LP right now, but I think it might be due for a repotting (I'm getting constant squealing...much more than with my Ant). I'm anticipating that this could take a while to get this done at Seymour Duncan HQ, so I'm eyeing a Custom and a spare A5 magnet I have laying around. It's either that or a Dimarzio Super Distortion.