[MizunoJoe]

The word bat does not imply that to me. if the point of the bat is to show you that a closing only club face produces more compression than one that does not... it is absolutely correct! It's not adding velocity to the sweetspot but rather the golf ball ( not sure velocity is the right word) I think there is nothing wrong with the little bat attached to the shaft. The horizontal hinge is JUST like a baseball bat because baseball is on a horizontal plane! Or at least ver close to it. The bat is a closing door without the distraction of the lofted face, just as the horizontal hinge is a closing door in golf we are not on a horizontal plane thus requiring the dual horizontal hinge

The club face is the "little end" of a big bat, but that doesn't make it a little bat, unless you choked down all the way to the hosel!

Horizontal Hinging gives more compression because it eliminates the layback component of Angled Hinging.