Under 2-H, HK wrote-: "The straight line requirements of the Compression Point are satisfied as long as the Lever Assembly Center is moving in a circle during Impact and Both the Vertical and Horizontal Centers move precisely in unison.
What is the Vertical Center?
What is the Horizontal Center?
The two Centers you have referenced -- one for the Clubhead and the other for the Clubface (2-D-0) -- have nothing to do with the Pivot Center (The Glossary). Hence, they are not appropriate to this thread.
I will answer, but only in a dedicated thread, and that only because nobody I've read -- no matter how famous their MORAD or S&T instruction -- has gotten it right. However, I must warn you . . .
1. It will be without illustration (which I am not now prepared to supply), and thus, the answer will be somewhat obtuse.
2. Further, it will be provided only as my time allows in the very busy days ahead.
3. Finally, it will be useful to only a handful of people in the world.
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