Given that there are some useful fuel-powered things, it'd be nice to get "how far away is far enough" advice from the fire marshal. The gas generator in the timing guy's van was probably close enough to get everyone DQ'd if anyone noticed.
Everyone can explain what the pencil test is, but nobody can point to a line in the rules that make it an official thing, other than "whatever else the safety chair feels is unsafe."
The hatch was doing a hungry-hungry-hippo imitation down the back hills, but still finished on the buggy, so I don't see how it could've been called loss of mass unless they left a screw somewhere on the course. Presumably the buggy never passed a safety inspection with a loose hatch, and so had just raced with an unapproved modification to its protective cage. It sucks for Fringe, but with the way teams have been getting lax with hatches in recent years, the only things that might result in change are either a contender getting DQ'd, or a driver eating hay after her hatch fell off, so maybe some good comes of it.