Hi there I am the owner of a 2006 MIM PB deluxe, rosewood neck, which already been through many upgrades (Handmade bone nut, Hi-mass bridge, copper shielding, Passive switch added, Passive tone added, volume pot on active circuit to match the passive volume, and 18V mod). I'm happy with it, but there's one thing i'd like to improve is the J pup. I like what i'm getting from the noiseless P pup, maybe a bit bassy but with a decent setting on the amp it has some bite. The J however is not quite as good, sounds tiny and trebble-y. Not a new story as i saw many topics there (and elsewhere) discussing this. But most of the time the advice is to change the whole set... What would be the advice if i wanted to change the J only ?