Why does my head move down at the top of my BS?
 

Any ideas? My head moves forward or down towards the ball about 4 inches, why?

What's your right leg doing?

You're bobbing-one of Homers' "snares" . As to why you are doing it ,take some video -it ,in my experience, is a tendency to "hit'-when trying to swing.

raise
 

You raise the club up by the arms and hands, instead of pivot (or shoulder) rotation.

Flying right elbow, as well.

Pivot alone will not get the hands in the correct onplane position at the top of the swing...I would think that it is primarily the responsibility of the hands supported by the right forearm. The right shoulder turns to the plane.

Getting straight at the top of my BS.

Yes, I have a "lift" at the top, rather than a wide "push" away with the hands.

I did that because,

I want to play on Rotated shoulder turn, and deepen my arm ... In order to get back on plane, my spine have to steepen. to get the shaft steep back.. Kinda a reaction to get back on plane.



One way to solve this is to lift the arm more. or work on a better setup.

Because you are trying to create power in your back swing, rather than just putting the club and yourself in the correct position to make an efficient down swing, and lifting up in the process.

Ben Doyle: "What you load is what you dump".

Yes, it can!
 

Instead of you, the pivot rotation powers the arms and hands, which powers the club, of which momentum creates the right wrist bent, left wrist cock, right arm fold and both forearm rotation, all perfectly on-plane.