Doc Burger has assembled a single-fan class racer out of an old Polaris TX. If you look over his sled you can see he has concentrated on handling. Note leaf spring stabilizers, short light skis and skegs.
To this oval monster he has added ski spreaders that I make but don't advertise well-they add 6" to the overall stance. I would have to guess that Doc is going to have control unlike others in his class. He should kick butt this winter in, if I remember correctly, Alaska.