HI mate, I have exactly the same problem, i have the prodrive brakes fitted, its the hardness of the pad, for some reason some cars grind and some dont. i think its all in the driving style. i spoke with prodrive and they said.... if its grinding,...its working and i am driving correctly, if not... then I aint!! and the brakes will not last. I also have the heat rings. So, i guess we need to keep them grinding. The prodrive alcon brakes and blue pads were used in the 99/00 WRC car and in some cases they only got circa 100miles to a set of pads. So I gues 9.5k is not bad considering. All this off course assuming you have the prodrive set up.