Nasty,
Interesting handle.
Basically Yoda is making a putting stroke which complies with his primary swing pattern. In it, he sets up so the ball is struck at, or just prior to the low point of the swing, which is just opposite of his left shoulder. The left shoulder is the top of the swing radius rather than the spine. You will find that in nearly every swing, the left shoulder to clubhead distance defines the full radius at low point.
There are many styles of putting which are geometrically sound, one of the most common is a hands centered, shoulder rock with the arms and hands frozen. This puts the center of rotation around the spine and is also very effective. But why should someone have to change their stroke pattern when they walk up on the putting green? Why not use your primary stroke pattern with the flat stick?
Bagger
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