Maybe I missed something he said, but what difference does GPS make against the difference in 60 feet. I would imagine they timed both of them and had a difference in time which back calculated to 60 feet. Ok, If the GPS is wrong, won't it be wrong for both? I really doubt if there was someone at the end with a tape measure. Who cares if the distance was wrong, 60 feet, 40 feet, What was the time difference? Any thoughts?