[Dariusz J.]

Jeff,

Let me express my voice as a huge Hogan fan that analyzes his swing motion almost everyday.
Look at those two photos in your above post. Compare how many degrees Hogan's hips turned left (the belt buckle is still visible on the second photo) with the right elbow movement.
Sorry to say, but when looking at the photos I find it simply not natural that the sharp hip turn caused Hogan's elbow to move that far down. Granted, the hip turn will flatten the arc a bit but, IMHO, it's not possible to say that it causes everything (i.e. flattening the plane, bringing right elbow to the right hip and flattening the left wrist).
Do an experiment yourself - go to the top with a cupped left wrist and just turn your hips as quick as possible without trying to go low with the clubhead to the ground in urge to hit the ball - jus hold the club and turn your hips - you'll observe that your cupped left wrist remains cupped despite the turn.
It implies that except the obvious froces as hips leading the downswing (after the CoG shift) and pulling with the left side of the body there must be a force generated by the right side (hand, forearm, elbow, shoulder, etc.) in a due time in synch with the pivot.

Pistol's theory based on Tom Tomasello's findings is very interesting. Many people tried to explain Hogan's swing with ONLY left side and left arm turning and pulling towards the target, yet, noone is still able to duplicate his swing motion decently in every aspect of the swing. I watched Tomasello's vids and what he says is very convincing. The "right hand karate chop down and out" he is talking about really flattens left wrist, lets right wrist remain in dorsiflexed, and ensure that the clubface becomes square to the arc almost automatically, provided the body work is proper.
It's much better than Hardy's "twist" part of the "twist&throw" concept that cannot be observed in Mr.Hogan's motion. Despite the lack of it, he delivered the clubface square to the arc before entering impact zone. IMHO, not all puzzles of "Hogan's secret" are discovered and put in a proper place so far.

Cheers