[golf2much]

"When no.3 is directly facing the plane they are parallel. But then the question was - where are they parallel. Ive drawn this third plane (Jen's Plane) and you can see that this parallel relationship by means of being vertical to the third plane (Jen's Plane). Now its about defining that third plane(Jen's plane)."

If I understand correctly, Jen's plane would be the plane in which the #3acc operates, up or down to the inclined swing plane, controlled by the right forearm and left arm checkrein action. In a swing with no shift, #3 whould have no movement with respect to Jen's Plane.

G2M