As I have noticed recently on video, my plane angle is close to the Rotated Plane Angle. I have a separate issue of raising my arms with my shoulders...with both of these, my shoulder angle is pretty sttep on the backswing and downswing.
I would much prefer to get have a 'flatter' shoulder turn...one catch though; I sometimes get too inside on the backswing (been working more on the 'UP"). I want to NOT RAISE THE ARMS, FLATTEN THE SHOULDER TURN, while I trace a straight plane line.....all while letting Centrifugal Force bring my club into impact....any thoughts??