Hi.
Mine did that. Its the tracking honest. Took it to a guy here in the Midlands and he's fixed it. It would appear that they different to normal in their set up as you need to set the steering wheel straight, pop a pin in at the s/box, then set the left roadwheel straight and then set the right wheel straght from the left wheel(i think thats the right way round). I had no joy at all with any of the mainstream guy's as they said it was acceptable at three degrees. Anyway it cost £30 and now it doesnt pull at all or sound like it had American movie tyres on every island.
I'm in Dudley in the west Mids if you need to find him.
Cheers, Nick.