[O.B.Left]

Arc of Approach is the motion, the delivery line of the clubhead and its geometric basis is the Plane Line.

Actually, 1-L-10 reads as follows: The Lever Assembly must be driven "Through" Impact by an On Plane force (moving toward the Plane Line).

So the Delivery Line is On Plane for the Swinger , Arc of Approach, the motion but the Thrust is crossline? Or are you saying the Hitters Thrust is crossline, Angle of Approach? That I get. Or are you talking divergent vectors or something?

I am such a stupid.