given that i have had to replace the ccm discs and pads on the cs after a few track sessions and a slide in the kitty litter, i have started to think that i would be better off keeping the cs away from the track, and get a specific track car. i see 10 year old challenge cars going for what appears to be very little. of course, i am aware that the purchase price is just the start...and the maintenance issues can be killer. but at least they run on steel brakes !! so. provided i found a challenge car that is in decent shape, and everything checked out technically, what kind of costs can i expect if i ran it in approximately 4 track days per year.