Check out reply #3. This is how I made mine.https://www.gatewaytoairguns.org/GTA/index.php?topic=193036.msg156238536#msg156238536JMJinNC
Fwiw, I have a GoPro Session. Tiny, but huge FOV, and I’m unwilling to crack it. I printed an adapter to mount the iPhone, thus saving my beam splitter “chassis”.JMJinNC
Think about mixing the cat food with some water. Make almost a soup...-Y
You're going to end up with all the neighborhood cats at your bait station!