[whip]

The term "bat" implies the sweetspot is given added velocity by face rotation, which doesn't happen because the sweetspot is the center of the face rotation.

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