for the studebaker, a simple tray like this is all i had in mind:

http://www.divergent.org/mikes.vws/images/R32/skidplate/plate_on_4.JPG

if the track merely recommended a tray and the stude turned it down, then yep, his bad luck. BUT i would feel bad if someone turned down a tray and took out the guy in the next lane who put the time/$$ into his racecar.

i guess fontana has concrete walls because the sandy desert is not there to "decelerate" you like lacr or willow springs.

i read all your comments and you make a good arguments (even mentioning gaps that wouldn't cost anything to change, eg. procedures). Thanks.

In retrospect, the thread title is too "authoritative" and I didn't mean it that way.