Spoke with my dealer yesterday, he said that M3W sales in the U.S. are pretty slow at the moment - mainly because of the bump steer and bevel box issues. He said these two issues are often raised by most people who come in for a test drive...and the most frequent reason people give for not ordering...
It's a shame...these are two issues that could have been easily solved with good engineering up front...
Don't know about the bevel box but the problem with the steering geometry is what happens when design aesthetics are allowed to rule over good engineering advice.