[MizunoJoe]

So your contention is that the hitter's pivot supplies zero action?

Both the pure Hitter and the 4-barrel Hitter have hip action, but neither use a spinning flywheel. The 4-barrel Hitter uses a brief right shoulder momentum injection as a launching platform from which to blast off. The right triceps fires as the right shoulder thrust stops. Only the right triceps/elbow uncock the left wrist(#2) and execute transfer power(#3) by putting a side force on the handle with no longitudinal force along the shaft, which is why there must be no pulling from the left shoulder/arm.