I am looking for info on where to draw lines on the picture during a video analysis with the student. I know 10-6 talks about the five different plane variations, and 7-6 teaches us that the clubshaft must start its journey the plane of its address angle.
From the down the line view, I currently draw a line from the hosel of the club up through the student's clubshaft, and draw another line from the inside aft quadrant of the ball through the right shoulder for Turned Shoulder Plane. Again, I realize the plane at the top can change, but I like to adhere to Mr. Kelley's advice and Yoda's advice to get the hands and #3 p.p. on the Turned Shoulder Plane at the top of the backswing.
My questions are from where do you draw these lines? Do you draw them both from the hosel, both from the inside aft quadrant of the ball, or somewhere else? I also know you can draw another line for the elbow plane. Which lines do you all use and how do you draw them? What about the face-on view as well?
Any advice would be greatly appreciated and I look forward to the discussion.