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...
I STRONGLY suspect a fix is imminent...too bad we all have already ordered...I wonder if the fix will be retrofitted.