I think what I am saying is being missed. I'm speaking of skull of prey to jaw width of snake comparison. The size of the skull is not proportional to the size of the body. A rat, or mouse, has a small non squishy head compared to its larger but squishy body. The skull also doesn't crush while the shoulder girdle, ribs, and pelvic girdle does.

And our guy is chunky. The "proper" sized prey compared to his weight is HUGE. I don't want him to be even more chunky.