Motionless right shoulder

[O.B.Left]

This is driving me nuts at the moment. I understand in better detail how the right forearm is supposed to operate. I can describe it...I know at least 4 drills that help develop it...I can do it...SELDOM! I am so used to wheeling it with my shoulders, taking it back low and slow with my left arm etc. Years and years of executed ignorance. I am going to keep plugging away with it. I have what I have termed an "arm sway" meaning my head is pretty well stationary ( and better on the centered end) but my right arm actually straightens in startup...it is almost imperceptible (in fact the only evidence is my feel...constrasted with a well executed start-up) I am having a good time working it out...I know I am working on the right things

Here is how I deal with a similar habit of straightening the right elbow in start up:
-my old swing saw a pronounced shoulder turn takeaway which enabled an extension of both arms going back. A disruption of the clubhead orbit resulting.
-with the left shoulder held still as a drill only, the right side must shorten as the power package moves away from the ball.
- you dont want to freeze up your shoulder turn but you must fight the tendency to over turn the left shoulder actively.
-The right shoulder governs the left shoulders motion.
-My feel is a turn of the right shoulder away that allows it and right arm bending to pull the left arm which pulls the left shoulder around. Weird but thats the notion.
-The right arm will then shorten immediately in startup.