[Daryl]

The question to be answered is WHEN do you define what plane you are on when the REAL business occurs? Homer said you could clown the backstroke . . . . so you can certainly be "on-plane" in the backstroke right. . . but the IMPERATIVE is the line of compression . . . So when would you say that the plane is defined on the downstroke?

The Angle of the Clubshaft is the Plane. I think that plane angle is not important if you don't use the same angle during the release as at impact (unless you're using a Flip Release). Being able to generate clubhead speed and direct the clubhead simultaneously means you need Plane/Clubshaft Control.