Arm only is like any other normal golf stroke....Low Point at l. shoulder.

For me, the shaft points at the sternum in the backswing and then not at all in the downswing.

Your hands reach the lowest point of the circle at your left shoulder (l. shoulder is centre of circle).

The line that points to the sternum (spine) or left shoulder is easily seen on video.....but I can definitely see where anyone could get confused without the aid of video. So....don't worry about it. Concentrate that energy on the SPL, HINGING, and LAG PRESSURE FOR FEEL.

Arm only would point at the left shoulder socket, aka low point. A mute point here is that any bending of the right wrist will change all these alignments....the same for any bending of the left wrist through impact alignments.

Your hands reach their farthest point away from 'center' at both arms straight, follow through.

The clubHEAD reaches its lowest point 'relative to the ground' at the left shoulder.

Actually yes you're right vj...

I thought it pointed to my sternum on the way back....I only checked quickly sitting here at my desk....wrong tho.

Not sure what you mean Ed....? The radius is constant....length of straight left arm.

Ya that's what I was talkin about.

Stand in front of a mirror- hands are the lowest at l. shoulder.