Let us hear (read) some ideas about how SPINE POSITIONS at Address... Face On and Down the Line can influence a golf stroke. Include degree of tilt, bend, posture, etc..
Here's something new I'm trying... at Address, I try to feel as if I am creating as much distance as possible between the Clubhead and my Swing Center (the stationary Head, or perhaps more accurately, the base of the Neck). This encourages two things for me: Extensor Action and a straight posture.