It smells well over the pond.......save for me pls.
Now, IF the quote is valid, WHY does he say that both SWINGING and Hitting DRIVE on a ANGLE OF APPROACH........
Thats why, the first question to answer is IF it is valid........
Holla
Because THRUST is ALWAYS ALWAYS ALWAYS Crossline . . . even CF goes OUT . . . .that's why your clubface is hooked. The force is at right angles to the radius which is going down OUT and forward. the clubface is hooked to divert the force down the target line.