[tongzilla]

What is a Swivel?
A Swivel is a rotation of the Left Wrist from a Turned position to a Vertical position (Release Swivel) or from a Vertical position to a Turned position (Startup Swivel).

For those enquiring minds who need references to confirm what I've just stated:

4-C-2: “When TURNED…the left palm faces directly toward that Plane."

4-D-0:
"Normally, only Swingers with their Standard Wrist Action (10-18-A) “Swivel” –- that is, actually rotate the Left Wrist –- through Release into its Vertical Position for Impact." [bold by tongzilla]

10-18-A:
Standard Wrist Action
"With this procedure with Wrist is Turned and Cocked (FCT) during the Backstroke which requires that it be Rolled and Uncocked during the Release. Only where this procedure is used, do the Hands “Swivel” into Hinge Action Position." [bold by tongzilla]


Hence my conclusion:
The Left Arm Flying Wedge must be facing directly toward the Plane from the end of the Startup Swivel until the beginning of Release, according to The Golfing Machine.

But a lot of people disagree with that (including me). So it's either wrong, or have I missed something?