[3Putt]

That said, I think the relationship of the plane of the wrist cock may be better understood relative to the left arm flying wedge, and not the left wrist bones.

That allows for what appears to be a 'turned' left wrist, but still an 'in line' left arm flying wedge, based on an individuals anatomy.

I like the above comment from EdZ.

It is important to remember from 4-D-1 that when referring to Flat Left Wrist during impact, Flat Left Wrist refers to 10-2-B grip type. So if your personal grip type has the left wrist turned more than what is depicted by 10-2-B, then your visual check for proper impact alignment, ie flat left wrist, must be reflect this.

I seem to have in mind that "geometically flat" refers to this condition ( being 'in line' with the left arm flying wedge), though I cannot locate the book reference right now.

Please keep in mind this is only the interpretation of 3Putt.....so read at your own risk. I would like to hear an opinion from someone if I am on the right track or off base.

Thanks.
3Putt