Along the way, I asked Neil to snap a few 'up close and personal' of John and me during his swing. That's me just out of the camera frame to the left. Note in the first photo the full shoulder and hip turns (90 and 45 degrees respectively).
Now, in the second photo, the move virtually no high-handicapper makes: the hips are back to square while the right shoulder lags substantially and remains on plane.
Finally, nearing impact, the hips have cleared through, but the shoulders remain parallel to the plane line (normally also the target line). At this point in the stroke, virtually every poor player has his shoulders facing left (with little or no 'separation' of the hip and shoulder turns). Note also John's on plane right elbow with the the forearm pointing directly at the baseline of the plane. In contrast, the right elbow and forearm of every hacker is much higher and well above plane.
Here's the 'inside scoop' as John explained the importance of the Forward Press that leads to a perfect Start Up. The Forward Press (rotation of all Machine components into their Impact alignments) is followed by a momentary return to Adjusted Address and its final alignment: Clear Right Hip. The entire motion is sequenced (in John's words "synchonized") with the Start Up requirements; namely, the mandatory Right Forearm Takeaway that establishes the Extensor Action of the right triceps and the maintenance of the On Plane Wrist and Clubshaft alignments.
In the afternoon comes Katie Skeeles, a student of two years now and a freshman on scholarship at Birmingham Southern. Her driver shaft is visually way too flexible. Originally fitted 'just right', she now loads it like it was a "whippy".
That said and recommendations noted, our focus was on fitting her for a new set of irons. Head and shaft. The head visually important -- technically, too, with all kinds of options, perimeter weighting vs. blades, etc. -- but most important, the shaft and its 'feel'.
We exhausted the Mizuno cart, with heads ranging from the MP 68s to the MP 53s. (She couldn't even look at the clunky alternatives.) And the shafts? Don't even ask. No graphite or steel option stone was left unturned.
All while John Riegger looked on and offered 26 years of PGA TOUR advice.
Note in the first photo the full shoulder and hip turns (90 and 45 degrees respectively). 
Hybrid Mode
