I did not experience a shimmy, that is likely rotors or a wheel bearing. Uneven torque on lug nuts can warp the rotors (BMW spec. torque is 103ft.lbs per lug). I use what's called a 'whip stick' to put my lugs back on with an air wrench, and so far, so good. Vonchor posted a test flight for the wheel bearing problem:

http://www.xoutpost.com/showthread.php?p=22333#post22333

Try that out if you haven't already.

JV

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JV

What gets us into trouble is not what we don't know...it's what we know for sure that just ain't so