OK, but why would one point the dowel at the Impact Plane line when the Inclined Plane of the clubshaft is well inside the ball at ground level (ref 10-5, 10-23, 1-L))?
The dowel has a Sweetspot at its tip.
The Golf Club has a Sweetspot in the middle of the Clubface.
The Right Forearm and #3 Pressure Point uses both to Trace the Straight Plane Line.