Quote Originally Posted by mr rusty View Post
On my 635 I have cut a little bit of plastic out of a film can that slips in tight against the m-x lever and locks it in the x position to stop inadvertent use. The flexibility of the plastic is enough to tweak it into position and robust enough to keep it in place.

Attachment 61188

This is only an issue if you try to use the self timer in M mode correct? Otherwise you shouldn't need to worry?

I don't foresee myself ever using the self timer though.