Oh One more note on my refrence of blowing the caliper at the track and having to get it towed to a dealer. It was the single best service interaction I have ever had at a dealer. they got the car on a monday morning and somehow located a caliper within the area for an e30 (i figured it would take a day for them to order it) and they turned the car around after 4 hours with it. The service guy I delt with was very interested in his job and the nicest person I have delt with at a dealer and he went out of his way to get the job done fast and right so i could get back to where i needed to be.