Here's a question for you regarding setting the tweak, do you guys set the tweak using 'used' tyres? Normally the larger sized tyre goes on the outside, so do you set the tweak then, or when the tyres are trued to be the same size? The only reason I ask is that it seems to me that if the tyres are diferant sizes, and you set the tweak using them, then, as soon as you run your car, the setting will go out as the outside tyre wears more than the inside. I have a set of CRC high roller rims with a O-ring superglued to each, and use them to set the tweak. Then, I put the wheels/tyres on that I am giong to use. Does anyone else do this?