Hey there all, I just had a local guy set up my Squier Jazz bass and I keep getting a clank on the upper frets. The strings are hitting when I play around fret 19 and 20. I will not go back to this guy as he is not super detail oriented when it comes to repairs. ( not a happy camper right now) The clank sounds like a thumb slap at the edge of the neck. Do I raise the strings or is the truss rod not set right? My other Jazz basses do not do this when I play, so you can rule out player errors.