How do you want to use a class 1 lever in the golf stroke dlam?
Is it possible to regard the shoulder rotation in the backstroke as a merry-go-round (flat) and the shoulder movement in the downstroke more as a seesaw? (Right shoulder down)
Yes I would think so. And it's pretty close to Homer's prescription too.
I think there are good patterns out there that think "flat" in the downstroke as well but flat in the backstroke isn't disputed as far as I know. It's basically how you create a turn instead of a tilt IMO.