I have no idea what "Angle of Approach moves the Primary Lever past the Hinge for Impact means???
Where did HK write about this? He recognized plane shifts but not tied to exit path I think??? Then I need to tie it to hitting vs. swinging or maybe release type/hinge type and right arm pitch vs. punch. Very complex set of options. Arn't there?
HB
It's easier than that. But it doesn't bother me in the least if my hands are ahead at Impact and if my Finish Swivel is a little Above Plane. In fact, I think that it's good form.
If your hands get out beyond the Hinge before Impact, than the ONLY path the Hands can travel is UP, above Plane and along the Line of the Angle of Approach of your Right Forearm. Keep the Hands under (In-Line) with the Hinge for Impact Which will allow the Hands and Right Forearm to remain On-Plane until the Finish Swivel.
Example:
If your Stance is too narrow, you hands will pass the Hinge before the Right Forearm reaches the On-Plane Angle of Approach.
In the Pic below, his Hands are directly Under the Hinge when his Right Forearm reached the Angle of Approach.