[Yoda]

Lynn why do you say it encourages throwaway?

...if a student can do this "over roll" it suuuure is hard to flip it doing that type of move isn't it?

Flipping (Left Wrist Bending through Impact) and Over Roll (Left Wrist Swiveling replacing Left Wrist Hinge Action through Impact) both destroy Rhythm (the In Line condition of the Left Arm and Clubshaft). Hence, in both cases, there is Throwaway, i.e., the Clubhead moves past its mandatory In Line condition with the Left Arm (2-G).

The cure for each is to observe the definitive alignments:

1. Hinge Action -- The Left Wrist remains Vertical (4-C-1) to the desired Plane of Clubface Motion -- Horizontal (Closing Only), Vertical (Layback Only) or Angled (Simultaneous Close and Layback) -- from Impact to the end of the Follow-Through (Both Arms Straight position). The Right Wrist responds and also remains Vertical.

2. Swivel Action -- Then, and only then, the Left Wrist Swivels (twists counter-clockwise per 4-C-3) into its Parallel to the Plane alignment for the Finish. Again, the Right Wrist responds and also Swivels.