One thing I wish would happen with some tracks over here in the states is this. With all this talk about tires wearing out too quickly on blue groove surfaces and what have you. What I am surprised is that a track hasn't tried to build a grass track with supercross style jumps. I had a practice track like this when I was a kid in my parents back yard. It was easy on tires like a loamier track but held together better like a clay track. One other nice little side effect is that the cars generally stay cleaner per run.