Finally got some track time with my new Schelle Racing +4mm chassis. So far I like it a lot. Since the extra length is in the front, it calms down the too-aggressive steering the car has normally. Car is now actually the same wheelbase as my 2w buggy. Less over-aggressive weight transfer to the front when coming hard into the turns, so the front doesn't grab suddenly and snap oversteer. Easier to drive harder, the suspension doesn't get all out of shape from getting on the gas hard, like it did on the stock chassis. And it doesn't add 100g to the weight of the car.