[YodasLuke]

The shoulder only stroke utilizes the turning of the shoulders on an incline plane. As with all strokes the hands educate the pivot so tracing a staight plane line, moving the putter head along a plane board (angle) or using a curved device (putting arc) will teach the shoulders to move on an incline plane. The right shoulder must move on plane to keep the putter head moving on plane during the shoulder only stroke.
The shoulder only stroke moves the Thorasic Spinal region, not the lumbar or cerebral. Therefore the low point of the shoulder only stroke would be opposite the Thorasic Region of the spine which is slightly further back than that of the left shoulder.

So low point for the shoulder only stroke and low point for the right arm stroke are different.

VJ,
I love your stuff and have read many of your posts, and I think this is my virgin post about putting. Additionally, if Yoda tells me someone is "the man", I take him at his word. He's very impressed with your knowledge. And, I would agree with your assessments above.
But, I'll convey to you my personal experience. I have always been a great putter. Until I met Yoda, I couldn't hit it in the ocean from the beach. I was terrible with three dimensional impact. So, only recently have I been able to move up the ranks in our Section events, with better ball striking.
I've always been 10-3-H (Paw) with both arms frozen and bent. I've done this as long as I've been playing, and only recently (met Yoda in Feb. '04) have I found out the reason it worked so well.
I think the putting arc is a great tool, especially for the right arm stroke. I, personally, find the arc difficult to use as my plane of inclination seems to be so steep (if not vertical). I have the feeling of covering the line instead of tracing and the feeling of pure vertical hinging, not dual vertical. It's controlled steering. I know one of the tools you use is the laser to trace an inclined plane on the wall, but mine borders on vertical.
Am I smoking weed? Or, can you explain why this method is such an asset to me?

P.S. I'm looking forward to our school at Old Waverly.