I haven't read through the whole thread properly, so excuse me if I explain the obvious. Anyway, I'd just like to make a few points.
The use of the Dual Vertical Hinge (10-10-E) for putting is not ideal because of its Reverse Roll Feel. The Dual Hinge is necessary to keep the Clubshaft (Sweetspot Plane) On Plane while Clubface remain Vertical to the Vertical Plane at all times.
Vertical (Only) Hinge (10-10-B) is often used in a 'rocking shoulders' putting storke (Paw 10-3-H). No reverse roll feel is necessary, but again, the Clubface is always Vertical to the Vertical Plane. Here, the only way the Clubshaft can remain On Plane is if the Clubshaft is also vertical, so that it's perpendicular to the Hinge Pin. This gives us a vertical 'Inclined' Plane that is 90 degrees to the ground.
However, Vertical (Only) Hinging can also be used if the Clubshaft is setup on an Inclined Plane, a position which feels more natural to most golfers. But remember the Clubshaft will not remain on this Inclined Plane during the Stroke -- and don't worry -- this is not necessary in putting when you're using this procedure. The most important thing is that your upper left arm (from elbow to shoulder) should hang vertically to the ground, not at an angle. This ensures the blade of the hinge is always Vertical to the Horizontal Hinge Pin, the essense of Vertical Hinge Action. When performed correctly, you should get a No Roll Feel with the Clubface square to the Target Line at all times. This No Roll Feel is clearly much easier to replicate than the Reverse Roll Feel inherent with the Dual Vertical Hinge Action. During very long strokes when the upper left arm fails to remain vertical to the ground, the clubface will open/close the slightest amount because Vertical (Only) Hinge Action is no longer used.