I have a set of Performance Friction two piece rotors and the hat is narrower than the stock hat. I run H&R 15mm spacers in front and with the two piece rotors, the spacers won't slide on all the way (get hung up on the hub - they are hubcentric). Anyone have this same problem and have a solution? I was thinking of running a 1-2mm spacer between the two, but I'd rather not have multiple spacers when running at 150mph :-)