[HungryBear]

I ask if The mechanics I will describe below can also be found in TGM.

To demonstrate;
Find a long - about 10 ft. - dowel.
(I used a 10 ft. section of pvc 1/2 in. electrical conduit)
Hold it accross your choulders.
Take a stance parallel to the plane line,bend forward the "normal" waste bend.
if the shoulders are turned back and forth the "dowel" will lay on a plane above the normal plane.
Pivot to 90 degrees as in a normal backswing.
The dowel will now be 90 deg to the plane line and on the same slope as address.
Hula-Hula- shift your hips down target line but don't move your shoulders.
(this would be dynamic move but I cant do that and explain0
the dowel did not move but your spine has both a tilt an the forwaqrd bemd.
Now if the shoulders are rotated they will rotate on a plane that is tilted. Much as Hogan explains.
How does TGM handle this geometry?

HB