Where has me nut post gone then !!

[nick crisp]

I really don't see why you wouldn't put the 12mm nut on. It's so cheap and easy to do, surely you might as well do it and be 100% sure you won't get the problem, rather thannot do it and not be 100% sure you won't? And all this about trained mechanics, jeez, you're doing up a nut and folding over a tab washer! If you torque it to the recommended tightness, maybe even Loctite it for good measure, can someone explain to me where you could go wrong?