[Mathew]

Very good point and good post!

I think another interesting Plane Line to discuss would be the Separation Point Plane Line. The point of impact is of course important but doesn't take precidence over the position of the clubface at separation.

The point of seperation is incidental from the sweetspot going to the impact point plane line to the low point plane line.

The ground plane line and low point plane line are altered when the plane shifts around the impact point plane line. Likewise if you had a seperation plane line - it too will be altered with a shifting plane.

When we talk about the geometry of the clubhead orbit, we are talking about the delivering the sweetspot directly centered through the ball relative to the plane line direction regardless of clubface positioning altering the actual impact point of the ball. The two are unrelated...