“Butt Master 2006”
Does your rear end move toward the ball in the downstroke? If so then you are using a cross-lateral hip motion in the start down and that is compatible with Hitting only!
Swingers keep their butts “against the wall” because of a “parallel to the base line” hip motion.
For a drill set up for a shot without a club and place your rear end against the wall. Now make a swing. Did your butt move off the wall? Try again but this time feel like you “push” the wall backward as you start the downstroke.