Hello WNC - My friend uses a wide flat plate for a trigger system. You can buy smaller commercial versions that are big enough for a house cat and I think my buddy basically copied this design and just scaled it up for a bobcat. I only get to see him about once every 3 months since he lives in Colo., but will try to get some more info. next time I'm back. I do know that the trigger plate is somehow connected to a solid rod that runs over the inside top of the cage and back to the hinged door. The trigger plate is hinged, and I'm thinking that there is a small metal rod on both sides of the hinged trigger plate that connects to the solid rod overhead that runs back to the hinged door. He also lubes the metal parts of the rod with some graphite to make it work fast and quick once an animal steps on the trigger plate.
I wanna say he caught 7 or 8 cats last year with 5 cages, and many more grey fox that he had to release. Colorado apparently has grey fox as protected now. He has yet to get a yote in one of these and I doubt he ever will. The old wily yote is probably too smart to enter
