This was jerry1967's original question. I think the LEFT ARM ROTATION, in certain cases CAN be a conscious thing, especially if the player is not automatically doing what he should.
What do you think?
Wouldn't it be more important to let the Hands function and allow the left arm to move accordingly?
This topic is more complex than it looks. One factor we have not discussed with this is GRIP TYPE. With a 10-2-F Grip, for example, both hands are already Turned. There is "no Turn or Roll." Employ the 10-2-B Strong Single Action, and use Standard Wrist Action, and there is a Turn and Roll.