[BerntR]

Even though the right shoulder is working down and out . . . it is still working ON TOP of the left arm Primary Lever . . . NOT UNDER NEATH IT . . . still tilting the tea cup but not shifting the plane . . . ultimate efficiency.

Interesting stuff!

The right shoulder motion drives the hands down underneath the shoulders own path. Notice how steep his hand path is initially. Also notice that his right shoulder is almost straight above his hands. So if all he does with his right arm is push (as in extencior action or threecep drive loading), he is pushing the hands on an very steep plane. This plane could be drawn as a line straight from his right shoulder and through his pp#1.

There are opposing forces at work here. The force from his left shoulder will be pulling on a more shallow path than the right shoulder is pushing. And it all adds up to a hand path that is nevertheless much steeper than the inclined plane that the secondary assembly lever impacts the ball on. And as the right arm straightens, the push force from the right shoulder will gradually change it's inclination towards flatter.

The secondary assembly lever gets trapped underneath his shoulder turn and he can turn his shoulder hard on a plane that hovers above the ball, yet strike the ball with the sweet spot.