elbow , turned shoulder, pp#3 and Brian Gay

[IH82BOGEY]

I have been trying to figure out the elbow plane, turned shoulder plane, pp#3 and how Brian Gay swings. Seems like every thread I have read turns into an elbow vs turned shoulder argument. Not interested in that; I am just trying to figure out what is actually happening with Brian. I understand Brian sets up on the elbow forearm plane at address. Does he then try to swing on the elbow plane? Is he trying to take pp#3 and the sweet spot down the elbow plane to impact? OR Does he try and shift to the turned shoulder and then back to the elbow going back down? Seems confusing because in the premium video with Brian, Yoda describes the shoulder turning back to "the plane" as he shows dowels going up from the forearm. Is Yoda demonstrating turning the shoulders to the shoulder plane while keeping the hands and pp#3 on the elbow plane? Just trying to make sure. Thanks.