I just found the nut today and really looked at the connection. If you tighten the nut down, it restricts the ability of the latch to move. Cookshack put some blue goop on the end which was suppose to allow the nut to stay on the screw, without overtightening the connection and without backing off (loctite??).
I'll pick up a tube of that stuff and give it another shot. I guess you could also file the thread of the screw to prevent the nut from coming off again.
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