I bought a Palatino 500 shell. Replaced the bridge and tailpiece , disconnected the remaining jive guts.(installed KK bass master pro dual w/preamp). Replaced nut (Gollihur ebony) and dressed the fingerboard. Adjusted the truss rod and made my own special shoulder rest and peg. (orig missing of course) Strung up some Spiro mittels, then a set of 7710's. The issue: The A string has a bizzare distortion (acoustically and electric) all up and down the neck plus an intermittent metallic rattle buzz. (All metal stuff is screwed down good) Can an experienced Pally individual(s) chime in on anything.? I realize these things were hit or miss cheese boxes and could come out in the wash with a bit of work.