Chuck, is there any chance we can have some input into these rules? One safety-related rule that I've brought to the attention of organizers numerous times is night time headlight width.
As street drivers we've been programmed into correlating distance-between-headlights with distance-behind-us. The narrower the distance between headlights, the "farther away" the preceding car is. Unfortunately, many enduro cars have auxiliary headlights installed that are very close together; two common examples are Spec Racers that mount driving lights over their heads on the narrow roll hoop, and Spec Miatas that mount driving light on the center of the nose and can't raise their normal headlamps.
I've personally witnessed - and have almost been involved in - many an avoidable crash where one of these vehicles with narrow headlights dives into a corner under a slower car, only to have that slower car turn into them. The reason these incidents happen is because the cars with the narrower headlights "appear" farther away, and as the leading car looks up to see who's coming before turn-in has no idea that the faster car behind them is only a few car lengths back.
Of course, there's a simple answer to this: specify a minimum distance between headlamps. This number doesn't necessarily have to be random; the distance between a pair of Spec Miata headlamps would work perfectly fine, which would require SM drivers to design their system such that they can raise their stock headlamps (with those big aux lights hanging out there in the breeze it won't add THAT much drag...) The Spec Racers would just need to widen out their lamp mounting brackets a bit - and I suggest that if they've noticed a lot of guys turning into them at night, it might be a good idea to do it anyway, even without a rule.
And, the rules can be flexible enough such that if one of the two lamps goes out, then one is fine; I know that if I have a car coming up on me with only one lamp I'm especially careful and rarely surprised
Food for thought, but this is my #1 pet peeve about endurance racing equipment. - GA