I agree that whilst sprinting and hillclimbing is fun, it's also more than that; I agree with David's comments #22. Warm tyres have a marked impact on grip, and at the sharp end of the classes can provide a significant advantage to the "second" driver. There will be relatively few occasions when changing conditions will impact an "out of class" driver, and then it will be win some, lose some. Warm tyres give an advantage every time. I support the spirit of the change proposal however it is worded to ensure the principle is achieved. I also agree with the proposed power limit of 220bhp for Class 4 for the reasons AB has given. Rob