Holder with a better than screw the rocker arms

Since the end of September 2012, Busch & Müller under the old Product 492HOPB only the Overzised handlebar holder with the Schraubschließe (not ready to the rocker arm) for Ixon Models ago, there was often with the old rocker (according to B + M) problems. I have received this support with screw by the seller.
31,8mm to my arm I could safely and securely attach the holder, even if the screw it was a bit tedious. If the holder does not want to constantly change, then this is a good solution and recommended. Should the holder constantly switch from wheel to wheel, then the purchase is recommended by a holder per wheel.