RE: carter vs truball rotating head
I don't like those free-floating heads. They're usually longer, which robs you of power stroke. And the last thing I need when getting ready to draw on a big game animal is to waste time piddling around with hooking on to the string.
I had one of those releases once; the first thing I did was wrap some duct tape around the head so it DIDN'T rotate.
Never trust a bow under 40 (inches).