I just upgraded to a 3 pos custom tuned chip from www.dp-tuner.com. GREAT service and just nice folks. They are located in Ashville. Supposed to be the schiznit tuner according to everyone on thedieselstop.com. Very happy with it so far. I have 3 programs, 40 hp tow, 80 hp econo, and 120 hp race for play.