I saw the show. Yes, no doubt the 'casts' are a great proxy for setting and keeping the flying wedges, although as has been discussed previously, I like the 'ace bandage' image better than casts, which create too much tension IMO.
The best part of Venturi's motion is his takeaway, I completely agree with McLean on that. He really shows a spectacular feel for his right forearm in his motion, far better than most with the exception of Mickey Wright, who was probably a touch better due to her address position.
Both are a good example of a slight 'lagging clubhead takeaway' and hence keep the right forearm and shaft in excellent alignments during the move away from the ball.
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Simplicity buffs, see 5-0, 1-L, 2-0 A and B 10-2-B, 4-D, 6B-1D, 6-B-3-0-1, 6-C-1, 6-E-2