I'm trying to learn and understand setups. I have been trying to set up my jazz bass to the proper specs. I have the string height at 6/64 at the 12th fret and the relief at the thickness of about 2 business cards at the 9th and 12th I'm still getting a lot of feet buzz up and down the board. I play with a fairly hard attack but I'm buzzing all over the place on every string especially the e. I would like to go a little lower maybe 4-5/64 but with the buzz I already have it's no use. WhT will help me. Shim perhaps ?