[O.B.Left]

Great lets change the subject to the orbit of the Clubhead and away from the path of the Hands. They relate but are not the same.

In the first sentence of the above Quote, HK says that the path of the clubhead orbit is not magic. It was was caused or results by combining two divergent force vectors. One outward and one downward.

And one backward and one upward on the backswing then, right?

In the "Basic" Stroke patterns of 12-1-0 and 12-2-0, these forces hold the Right shoulder on-plane during the downstroke.

The Right Shoulder moving On-Plane toward the Base Line is caused by, results from, a Balanced Out Force. But the Force of the Right Shoulder is an On-Plane Force (hopefully it's on-plane).

Not the entire downstroke, lower case "d". Or are you referring to the Downstroke in a TGM sense? You know, Startdown, Downstroke, Release etc.

For both Basic Patterns 12-1 Hitting and 12-2 Swinging Homer selected the Standard Shoulder turn variation. Flat back and On Plane going down. The Right Shoulder riding the Inclined Plane or the TSP in Startdown. This is achieved via Axis Tilt, Hip Slide which lowers the Right Shoulder and was defined by Homer as another Downward force in 2-N-1. It is not as your Cliffsnotes suggest a result of the Balanced Out Force of the divergent Vectors. It cant be both Downward and Balanced Out at the same time. 2-N-1 pertains to the Clubhead Orbit not the Path of the Right Shoulder. The Right Shoulders path is way, way back in the Pivot Train or kinetic link or whatever, important though it is.

So, don't use the Hands to create an On-plane force (unless you do it intentionally). Hands are clamps.

So dont use your Hands unintentionally? Is that what you mean? I used to use that excuse on dates all the time. "Oops sorry , didnt mean to do that ."
Hands are clamps, agreed. But when educated are used to great advantage. Didnt Lynn once say something like, "Its all about the Hands but its not a Handsy swing". I think it was in the Jeff Hull "From Mechanics to Feel" video.