hi robert
yes sam was lucky having his dad there to drum into him the fundmentals and his dad bob it a wounderful teacher, if you look at sam even now his head dont move, not even a little and he has a wounderful full shoulder turn, 700 tour events is some record too. sam does all the fundementals so well you tend not to look to deeply at his swing but he really has a great tempo and a swing that repeats over and over and he does every thing well but nothing outstanding, he just puts all the parts of the game together so well, think his dad bob had a lot to do with that too.
good point, if head still and spine angle good the every thing swings round them and it looks so simple, langer if good at the still head and the fixed spine and his shoulder and hips turn around his head and spine.
bill