Looks like my build has gone extremely well (In my sig "headless fretless 5"). All except the fact that I was trying to do a pre-setup (just to give it a run, before it gets finished). After lowering the bridge and setting them to a suitable level I adjusted the truss rods up and discovered, I have one particular place that's buzzing (around the 15th position, before and after that spot, it's ok). I stripped it took the tension off the trussrods, put a straight edge after a few minutes after that. Right at that before mentioned position, while holding the straight edge (4'), after the 15 position, it gradually drops after that position. Looks like there's high spot there, now the question (finally). I could heighten the action with no issues whatsoever, but I know I can get the action way better than that. How do each of youse guys level out a fingerboard (method/tools/etc), especially when it's already glued? Yes, this is a flat fingerboard. I think someone else here may have a better idea, than I.