[Bigwill]

...hi all, I don't have my book w/me at work, so can't reference. But something just occured to me. Should the trail (r) shoulder move on plane (on the downswing)? If yes, doesn't that mean that the (r) shoulder would move more -how to describe this- sort of, "around" the body, so to speak, instead of say, "down" towards the ground and under the plane?

I know what you're talking about. In my swing, my right shoulder tends to move straight down. So when I got in front of a mirror to practice moving it down plane, it (the right shoulder) felt to me as if it were moving more forward than down. If you tend to get under plane with the shoulder, like me, then an on-plane right shoulder may feel like it's going more out and around. It's all about perception and perspective.