The number the machine kicked out was 81 rpm/mph for 3rd gear run. It was connected to the machine by the PTU wire loop so it knew the rpm, and the machine knows the circumference of the rollers, so that number must be correct also then? I thought the guy may have entered that number incorrectly, but if the machine calculates it from the PTU wire and drum cricumference, he wouldn't have had to enter anything.