I put a capo on the first fret and pressed on the last fret (21st) and the relief at the 8th fret is set at 12 thousandths of an inch. Oh, and just FYI, the size of the intonation adjustment screws are #4 40 count threads, 1" long. I had to change to 1 1/4", and 1 1/2" screws. The hardware store...