Crap, my club don't have minimum weight rules because it is too hard to enforce. Yes, too hard. That is why the guy with a CF car will have much more advantage than a TA05, which I drive. Heck, there is no excuse to lose against me that has almost a 100g of handicap
I have pretty much all the lightweight things I can possibly have except the CF conversion, which goes against the idea of a tub car.
Anyway, at the club level racing, a lower weight limit will give more advantage to the people that have CF cars. Then all of a sudden, there is more of a reason why you need to buy an expensive car to compete? Where does this end?