DAN - Bryan has one on one of His Cub Cadets, His 1450 I think. TINY TACH is located in the Chicago area and Bryan posted some info about working with the owner of Tiny Tach to get them to work real accurately on the Kohler. The tachs are sensitive to the electrical "NOISE" the ignition system puts out. I think Bryan had to put a resistor or something on the input line to His. Hopefully He'll post some details since it's been a year I bet since it was last discussed.