[Loren]

Heh! I agree. Scratched a lot of head fur off m'self, thanks to bulldog.

So here's the deal, IMUO (in my unauthorized opinion).
Just trace the base line with the #3 pressure point and you're golden.
Or equivalently, direct the #3 pressure point to inside-aft quadrant.
How's that?

Bottom line according to the book, if you're using Circle Path you have to use Arc of Approach, or trace the plane line with #3 PP. Otherwise, any visually equivalent line is an option.

As a swinger, you bump parallel because you're using CF throw-out for alignment.
As a hitter, if you choose the steep alternate plane angle of Line of Approach
(10-5-E) you have to bump cross-line and cover the line on the ground with the clubhead, or trace the alternate plane line with #3 pressure point.

Already said too much.