the poles of my stingray 5 are a little beat covered by the rust ...i would like to change the pick up anyone can give me some advise about it? what kind of pick up do i have to choose? is there a pick-up with less high frequency? now i keep the high level controll always to the minimum ..i know that is the electronics of the bass to produce a lot of high frequency but maybe there is some remedy ....changing pick-up or modyfing something to solve it.....can you help me? keep on grooving.....always...!!