[Yoda]

Question: the subjects address position in the picture 10-6-B#1 shows the right wrist really uncocked. Is this required by the plane?

Regardless of Plane Angle, the Right Wrist is ideally held Level throughout the Stroke. The fact that the Wrist may appear Uncocked in 10-6-B #1 does not alter this Basic. It merely points to the fact that any photo in the book should be used as a check ONLY for the point under discussion and not those appearing incidentally (2-R).

And 10-6-B #1 refers only to the Turned Shoulder Plane Angle, not the Perpendicular alignment of the Right Wrist.

Study the Perpendicular Wrist Positions in 4-B-0/1/2/3. Especially study Photo 4-B-1. Level may be more "Uncocked" than you think!