[dkerby]

Bioengine,
I cannot speak for V.J. Trolio, but I do not think that
he ever insinuated that he descovered Rooting. Hd did
mention that Rooting was a martial art tecnique. Martial
Arts was in play long before Golf was invented.

I sence that the disagreement is when the center of mass
moves to the left. Your posts appear to indicated that
there is a gradual move to the left from the top of the
backswing. In Hogan's case the complete move was completed
prior to starting the downswing. Trlio did not say that
this was the way that it should or has to be done, but
the way that Hogan did it. A gradual shift of the center
of mass in the downswing followed by a hip turn is very difficult to execute.