I bought a (modified) Fender Jazz Bass Plus V a last spring. The action was pretty high and as I tried to set it up to my taste, I found out the truss rod nut was broken. Truss rod was ok though. With a new nut in place I managed to (gradually) set the relief to spec and the wood has now had some months to "set". Problem is there still remains a bump at the top frets, especially for the B and E strings. (Let's say the highest 5-7 frets.) Not that I play that high up on the neck for B and E but it forces me to raise the action an extra 1.5 - 2 mm higher on the B string. Is there a chance to repair the neck? I am also worried that any repair might affect the great tone of the instrument... As far as I know, this model has no Posiflex rods. It is maple neck / palisander fretboard and has a skunk stripe. Tone and sustain is top notch and the neck has only one very minor dead-ish spot at G string seventh fret. (I am really sensitive to that.) The whole bass is easily on par with the current American Deluxe Jazz Bass V for a fraction of the cost. Any advice is welcome!