I set up my new Charvel San Dimas, and I put a small 2 piece business card shim in the neck, and did a truss rod adjustment. I have the action PERFECT, except there is a little deadish buzz around the 3-5th frets. Not terrible, but still a bit noticable. Should I maybe take the truss rod back a bit, or remove one of the card pieces to make the shim a little smaller, or...??? Thoughts/suggestions? I really want the upper end of the fretboard to be close to where I have it now. thanks!