In the Yoda model, the backswing is having the right forearm aided by PP3 stay on plane. From what I remember of the TT arms video he talked about starting the backswing by bending the right wrist backward and then when the shaft was pointing straight back to raise the right arm starting from a point where the elbow was touching the body. I don't remember any language talking about keeping the backswing on plane with the right forearm. More specifically the video showed the right elbow returning to the hip with the right forearm above the elbow. When I copied that position, I lost the ability to drive my lag down the China, and the lag I had worked so hard on, faded away. Perhaps I misinterpreted something. When I drive my lag as low as possible, I don't end up in TT's position. Does that make any sense?