[O.B.Left]

If one were to have a flat left wrist - the wrist istself wouldn't cock and uncock on plane- because as you mentioned the left arm/shoulder (normally)isn't on-plane. And your problem is?

My fog surrounds the plane of the left hand wrist cock. Left Arm or Inclined Plane? It cant be both if the left arm isnt on the inclined plane. I want it on the Inclined Plane, but then what of the LAFW?

I get that if you turn your left hand to the plane with a little bending, the cocking and uncocking is on the plane but then you've added some Horizontal Left Hand Motion havent you? I thought that was a no,no?

Are you saying its grip type dependent? Did you mean "Flat" as weak or geometrically flat?