I know its held in with 12 bolts, but....This compares to grabbing the top of a swing set and see how long it takes to tip it over. The lack of attachment (maybe can't see it) at some point distal to the top of the bar seems like compromised physics to me. Seems you'd at least want to use the rear shoulder belt points for stability. ???? I expected someone to simply make a beefed up version of the rear crossmember of the chassis as its position is ideal already. Or use their central reinforcement and add to existing crossmember.
Julian, while 6 points are ideal, I dare say necessary on a race car with no airbags, I've always wondered about their advantages on a street car with functional airbags. You hit that hard, airbags go off. If belted properly down low and as tight as you can get it, I routinely buckle with seat back, tighten, then slide seat forward to make even tighter, your sub risk is minimal. Most folks grossly undertighten the lap belts IMHO.
Interesting how these designs come out, but no one has commented specifically on the "inadequacy" of the stock crossmember.