IMHOP the call to ban tripods was a rush to judgement.
Saying that though, I'd be REAL concerned about a Lakester using available streamline tubing for that structure -The readily available (w/o checking Aircraft Sruce etc.) as I recall, has a max wall thickness of .049.
In the case of Carr/Kaplan, I believe that was an older car that came from the dragstrip. Racing and TRAILERING takes its' toll.
It's probably unfair in some of the smaller classes, but better leave things alone and encougage beefy construction thruout.
A .250 wall by 1 5/8 or 1 3/4 axle with an aero fairing over it would keep my confidence up if I were a builder/driver and it'd be pretty slippery.