Today, the door in place but not calibrated or set right. So they could have hit it, but it wouldn't fall. Everyone that can lay, did lay today, and in the trap nest. None tripped it and closed the door, but the important part, they all did, as far as I can figure, touch the overhead door and still go in and lay.
After that, I took it back in the shop and perfected the door and installed the rest of the trim. String for hinges and it works pretty easily. Tomorrow is the real test. Will they trip it? Stay tuned!
That stick on top is a "handle." It works fine to grab that with one hand and grab it by the back in the other. Also testing the strength of the nails. They hold fine! Two 1 9/16 brads crossed in the top face frame board and it picks up no problem.
That thing on the right is an old file cabinet box that they don't like and never go in. I just left the there all this time though I should throw it out.
ETA: I didn't have any 1/2 inch or similar plywood but I did have 1/4 inch. So I used contact cement and made my own 1/2 inch plywood! LOL! Don't know how long it will hold but I will find out!
edit: found out later that 1/4" is what you need to use.