Again looking at how the mechanism works I can't see how "flicking" the shutter to achieve pseudo mirror lock could cause damage to the camera.What I have heard from a repairman was that, on slow speeds, once the mirror is up, there is free moving piece that may cause the speed to change. I have tried to shake an MX with the mirror up and check the speed on a tester before and after, and have not find any difference.
Rob Studdert
MX is an incredible camera.
Andre
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