I`m trying this at home and I cant get my left wrist straight unless my hands are forward, Now mid body is at your belly button right and my hand is cupped.
Shouldnt it be straight at the start, like impact position???
If you take your grip with flat level and vertical left wrist in the position it will be at impact... that is the real grip that the ball will experience if you make a relatively uncompensated swing...
The stating position ( eg. Mid-body hands) has to be very different... bent left wrist/ right wrist mild bend-or-flat... because the hands have moved away from the target.
WHen the hands move to mid-body position and the left wrist bends... the left wrist can remain vertical ( in which case the hosel rotates around the sweetspot giving a closed clubface) OR the left wrist rotates away from vertical and the score lines on the clubface stay square to target.... my interpretation of what i have learnt so far... so correct if needed
It does not matter because impact is an incidental moment during natural dynamic swing and all these initial positions/alignments will be taken care of by mother nature....