[12 piece bucket]

Powerdraw

That's a good point. Its' my impression when studying the swing video using my swing analyser program that the back of his left hand is moving vertical to the ground during the followthrough (rather than being vertical to the inclined plane), but it is seems that there is less external humeral rotation of the left humerus per unit time than one would expect if he had a more pronounced horizontal hinging action.

It could well be that I am wrong and that he is really using angled hinging.

Jeff.

Hard to say particularly with the plane angle that Sergio swings on . . . the flatter the plane the slower the face rotates for a given amount of roll.