Interesting update from Phil on his BB ...
http://www.bleazey.co.uk/M3W.html#MOUNT So the NVH kit allows some play in the BB. Fixing the mounting of the BB (and aligning to the drivetrain) seems a partial solution. Fascinating engineering diagnosis and its good to hear that the belt drive isn't too much of a problem. Wonder if any of his drivetrain mods will appear in future M3Ws? I like the Centa mods, bearing, and BB mount...