I've been looking at my basses, and I've noticed that not one of their nuts is the same thickness. I don't mean thickness in the same direction as the fretboard, but as in the length of the string that is pressing against the nut. Then I saw this pic of a roscoe: What's up widdat? Anyone have any preference in nut thickness? Does it affect tone or sustain, or 'in-tune'ness? Or does it do nothing at all?