Excellent videos, thanks for posting. Tomasello sure has alot of "Single most important partsof the golf swing". I think he refers to every part that way. It does make a good point about how many important parts there are to monitor, it just sounds funny though.

I watched the entire video in one sitting and that did jump out at me. HOWEVER, if you listen closely, he doesn't actually say "single most important part of the golf swing several times." He's normally referring to different things (backswing, downswing, pivot, etc) although I think there was one instance where he did contradict himself. But hey, so what?! :) It's his way of emphasizing a point, and it gets your attention!

How 'bout "sustaining the line of compression"?

Only if I was Liza Dolittle! :D (although I think Higgins calls on George rather than Jove!)