Let me just say one thing about HPi this time around- they are stepping it up in my opinion. I was very pleased to see they showed up for Cleveland this year. It shows me they are truly interested in doing things the right way. When I had the original Pro, i called the factory to get some advice for carpet racing. The answer was "make it stiff and low. We really don't do any carpet racing.." That didn't help a lot. The fact that they are now looking into all the aspects of racing says a lot about their commitment to development. I don't think they did as much for the pro3 as they are doing now.