Drew,
That's interesting, I can trace a straight plane but still focus #3pp at the inside aft quadrant,no?
I don't get the difference when tracing on an inclined plane.
Your Delivery Line goes through he back of the ball. Aim at the back of the ball.
If monitoring Arc of Approach, Angle of Approach, Delivery Paths of Thrust, use the Inside Aft Quadrant.