[hoppycalif]

Originally Posted by CraigThor

hoppy something like in this link maybe smaller.

http://www.hooverfence.com/woodfence/slideblatch.htm

Craig

Great idea! A small, simple version of that can sit on top of the wall mounting and either slide into a hole in the back link, or just block the movement of the back link. As I recall, Ace Hardware has some little brass ones that might work.