[Daryl]

Thanks Daryl
I now realize that we have much different geometry.
my left stays flat, wertical and moveing from cocked to uncocked-release to both arms straight.
My right stays vertical, level and bent and only releases bent as necessary after impact.
This, for me , is dual horizontal hinge.
The bones in my forearms do not change their relative position, release to arms streight.
We therefore have "differences" in extensor action application.
I thing I am OK with what HK wrote.

HB

Well, Vertical to the ground at Impact, for the Left Wrist, is also Vertical to the Plane of the Left Wrist Cock. But for the Right Forearm Wedge, Vertical to the Ground is not the same as Vertical to the Plane . Both Wedges are Vertical to their respective Planes at Impact. That puts them at 90 degrees to each other.

It doesn't sound like your Right Forearm Wedge is On-Plane at Impact.