Almost Automatic Door-Pop's version

[Pop]

As I was re-installing the door mechanism yesterday I realized that picture #5 was incorrect. I've replaced the picture with the correct one. The aluminum arm that is attached to the plexiglass door is needed. When the door closes the upper arm comes down and rests on top of it preventing a varmint from pushing the door up. I also changed the cable that connects the upper arm to the plexiglass door to a black coated cable so that it would show up a little better.
Sorry for the confusion.