[12 piece bucket]

An On Plane Clubshaft -- actually, per 2-F, the Centrifugal Line of Pull from the Sweet Spot to the #3 Pressure Point / right index finger, for which the Clubshaft is a suitable proxy -- always points at the Baseline of the Inclined Plane unless they are parallel (1-L #6).

The only reason to Rotate the normally Square Baseline (10-5-A) to the right, i.e., into a Closed alignment (10-5-E) is to produce -- depending on the Clubface alignment at Separation -- Hooks, Pushes and Pushed Cuts.

The false notion that the Baseline of the Plane must 'shift' to the right during the Downstroke is a holdover from the error in Ben Hogan's Five Lessons (pp. 87-89). It was wrong then, and it is wrong now. The Clubhead Orbit does not shift from a Square Plane Line to a Closed Plane Line. Instead, it continues Down-and-Out on the same Inclined Plane through Impact. With the Ball positioned prior to Low Point -- opposite the Left Shoulder -- this does indeed result in an Inside-Out Impact (Hogan's stated objective). But . . .

It does not result in an Inside-Out Stroke (Hogan's unfortunate explanation). Study 2-J-2.

In fact, in all geometrically-correct Strokes, Impact is always 'Inside-Out', i.e., Downplane through Impact to Low Point (1-L #13 and #14). This is true whether the Plane Line is Square (On-Line Stroke), Open (Outside-In Stroke) or Closed (Inside-Out Stroke).

Golf clap . . . .