Research "Hula Hula" for the relationship between Hip movement and a steady head. Im thinking that for a steady head the tailbone or hips need to move and vice versa. A steady tailbone can often lead to a moving head during full powered swings. The body swings the club and the club and its momentum swings the body.....so something has to give at full power to counter balance things. If you make it your tailbone via Hip Action then the Head can be steadied easier. Its sort of like one end of the pivot or body has to be anchored, ideally the Top, the Pivot Center, the Head commonly.
You can feel this if you do a swing with your butt up against a wall or door jam. When it holds its position things dont want to work properly. The hips need to move.
When you get your Hip Action happening you can then add some Right Hip Clearing to promote Arc or Angle of Attack compliance, an inside to out Delivery Path of the Hands. Two different concepts that work so well together in better swings. Like in this example below.
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