The treble pup on my new 4003 is hotter than hell, but no matter what I do, it overpowers the neck pup, which is quite honestly the weakest pickup I've ever encountered -- and I've owned 30 or 40 basses in my time. Has anyone ever tried the SD or other replacement pups? Any comments? Also, I don't remember my old 4001 having such a wimpy sounding neck pup -- is this something new with the 4003's? Thanks for any input!