One thing I noticed about racing on the controlled rubber tyre at Rocky, was that it was difficult to race close to another competitor without risking turning him around. As we have all experienced racing on foam tyres, you can attack a lot more without it turning to tears.
The overall principle was good, but I felt the racing lack the qualities that we are all use too. Just take a look at the Mod tourer racing. There were some great battles (especially in the Final) in there racing. Was it because they were on foams?
Is there such a thing as a controlled tyre that is foam?