I took the neck off my Tokai TPB-64 (P-bass) because I needed to loosen the truss rod. The TI flats simply didn't have enough tension and I needed to add a little bow or curve to the neck to eliminate the buzzing. It seemed okay with the Labella Flats it came with, but the tension is too high on those for my liking. When I took the neck off, I discovered a wedge shaped shim made from a thin pick. I'm trying to figure out whether to leave the shim in the neck pocket, or take it out since I'm switching to a lower tension string. Any advice would be greatly appreciated. Thanks!