[Yoda]

I think that many get position oriented instead of plane and load oriented. As an aside, it's something that I find comical about the "one plane"...

All this should probably be in another thread -- Bagger, help! -- and I should probably be asleep, but for now...

Here is my belated, much tongue-bitten take on the now well-known 'One Plane' Swing.

Per the illustrations in Jim Hardy's explanatory book(s), videos and commercials -- the 'One Plane Swing' puts the left arm in line with the shoulders -- right and left -- at the top. In other words, the arm swing and shoulders share the same 'one plane'. This is a very flat swing plane -- at best, an Elbow Plane -- that forfeits the Right Shoulder support (of the Hands) during the Start Down and Downstroke.

Fortunately, there is another 'One Plane' swing, the Turned Shoulder Plane of The Golfing Machine. Here the Hands arrive at the Top In Plane with the Right Shoulder and the Ball. The Left Shoulder obviously lies above that Plane. Even if, from Address, there is a Plane Shift during the Backstroke -- normally from an Elbow Plane to the Turned Right Shoulder Plane -- the Straight Line Hands-Right Shoulder-Ball relationship from the Top continues to rule.

In other words, the geometrically-ideal 'One Plane' swing is NOT on the flattish plane of the backstroke shoulder turn. Instead, it is on the plane of the Hands -- through the Right Shoulder -- to the Ball.