Lynn, What do you consider to be the disadvantages of hitting from impact address?
Mainly two, Thom:
First, the Clubhead is leading the Hands into the Backstroke. Hence, Clubhead Lag and Drag (6-C-0) -- the fundamental principal of the Golf Stroke -- is minimized in Start Up. Somewhere in the Stroke (no later than Start Down), this condition must be reversed so that the Hands can lead the Club into Impact.
Second, the Right Forearm points well ahead of the Ball at Address. This makes On Plane Right Forearm Tracing more difficult in Start Up.