What the heck, I'll jump in. How about rear tires that durometer out to somewhere around what you might find on an old Buick. I mean hard! You know, something that will last you two seasons. This eliminates the need for the big motor (money savings), utilizes the same wheels, tracks last longer (better racing), and little to no tire bill by comparison (more money saved). Also, more "little guys might give it a shot. What do you think?