I just bought a 5 string custom bass; beautiful hand rubbed mahogany body, set neck which is also screwed in, high mass bridge, 2 EMG pups, active with vol, vol, tone, active 9v 34in scale wearing High beams. 2 Ric truss rods, syn. bone nut, flamed maple neck with rosewood board 22 frets. Looks great, narrow neck plays great, incredible sustain, but has one sound with little variation. Nice but not versatile. Thinking of new onboard preamp, new pickup(s), wiring series/ parallel..... Need suggestions so I don't ruin the bass, waste a fortune or let an otherwise great bass languish. P.S. Wasn't looking for a five string but the price just covered the parts!