Have you had this problem sorted mate? not heard from you in a while.
Nath may be right and Hartge might be the best people to speak to...
One of my mates who works in RobertShaw is a member on hear, he's a great mechanic and knows alot about the MINI and has a Highly tuned
MCS himself, hes done all the work on my car, Pulley, crank pulley, stop bar, remap, brakes and all is fine.
Great garage in my respect.
He has a driver in the MINI Challenge and they are doing great.