[Yoda]

Isn´t Elbow plane 10-6-A and not an X?

The second 'departure' in my post referenced Plane Angle -- Variations (Component #7) not Plane Angle -- Basic (Component #6). The Shift from Elbow Plane (10-6-A) to Turned Shoulder Plane (10-6-B) is defined as Single Shift (10-7-B). The Shift from Hands Plane (10-6-E) to Elbow Plane is undefined as a Component #7 Variation. Hence, the "X" Classification per 1-K and 10-0.