Re: Just look at where and what the two ministers studied....
Might I humbly suggest a geometrically simpler model they might be better able to understand?
Consider a piece of rough hewn timber with 3 holes bored in it, split down the middle, and securely mounted horizontally to a post a few feet off the ground.
The horizontal split timber is mounted hinged at one end, with a secure clasp at the other with the holes also horizontal.
Polly's scrawny neck goes into larger centre hole, arms through outer two.
Clamp 'em shut, lock 'er up and chuck the key down the nearest cess pit.