Head position at setup

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Hi there, i swing from a hands forward address position similar to impact fix.

My head however tends to move backwards on the backswing (about a head's width from the setup position mid stance) and slightly back and down on the downswing.

If i'm swinging from impact fix where should my head be positioned at setup? seems like i'm fighting to keep it in a position it wasn't meant to be in.... should it be more to the right hand side?

Thanks