Lay a hardbound book on a table with the binding on your right. Visualize the binding as the base of the Inclined Plane. Pick up the "Inclined Plane" (the cover) and raise it up and down. Although it may be changing angles, your inflexible Inclined Plane stays flat. Take a pencil and twist it back and forth on the "Inclined Plane" as you raise it up and down. The pencil stays pointing at the Plane Line, per 7-6: "During any Shift of Planes the Clubshaft is held On Plane with the Plane Line as though the Plane itself were moving to the new location."
rwh,
i see what you're saying and i see what yoda was talking about plane shifts from 10-7...i think where i was "stuck" is the 2-F part of (my bold) "...a flat, inflexible, Inclined Plane which extends well beyond the circumfrence of the stroke-in every direction. The full length of the Club shaft remains unwaveringly on the face of this Inclined Plane--Waggle to Follow-through."...just couldn't get by the idea of a SINGLE inclined plane...thanks!