[Yoda]

What I am saying is, Ben is past follow through at the point you say he is at follow through.

And what I am saying is that, even though the Clubface may have been Square at the Point of Separation (1-L #17), these post-Impact photos are not the Clubface alignments of Hinge Action. They are the alignments of an Impact executed as an early Swivel (at the expense of a proper Hinge Action). And a Clubface facing the ground when the Clubshaft is parallel to the ground is symptomatic of an over Swivel. It should be facing the Plane.

Regarding whether or not Ben was at the end of the Follow-Through in the first frame, Mathew's analysis above is correct. There was no 'Both Arms Straight' in this Stroke, so we are left with the first frame where the Right Arm has become Straight. And my reference to '45 degrees to the ground, Clubface toe along the line' can be found in 2-G:

"Stop at the end of a short Chip Shot--the Club at about 45 degrees. With Horizontal Hinging, the toe of the Club will point along the Plane Line."

This is the 'swinging door' of the Horizontal Hinge Action -- the Clubface remaining Vertical to the Horizontal Plane through the Impact Interval. Ben's Clubface is Closing far more rapidly, indicative of Impact executed as a Swivel.

You are arguing positions. I am arguing alignments. We all need positions, but to be efficient, those positions must be geometrically-aligned. That is the whole premise behind G.O.L.F. -- Geometrically-Oriented Linear Force.