[Trig]

At the Top of the Backswing, the Right Palm is underneath and flat against the Plane, supporting the On Plane clubshaft. For your Right Forearm to be 90 degrees to the Plane, the Wrist bend would have to be 90 Degrees. So, if your're Forearm isn't 90 Degrees to the Plane, your Hands are out of position or your Wrist Bend is less than 90 Degrees. No law against having less than a 90 degree Wrist Bend.

Do you know where I can locate this in the book? I was thinking it was ideal to have the right forearm at a 90 degree angle to the plane at the top.