Using my legs .....
Nice; If you add a little counter clockwise torquing action to the rear foot/lower leg, you get a nice coil around that post.
Using my legs .....
This looks like the hips are leading the turn, causing her rear leg to turn in.
What is the action that goes on here?
The drill below (the boy's dad is a good dude), done correctly was the single most significant contribution to my players understanding of the concept being discussed. The temptation to use the arms and momentum when in this configuration is diminished significantly. The cue to maintain/increase the pullback suddenly makes sense to the 14 year old
brain. They finally feel the barrel being pulled by the rear hip/leg.
I use this swing thought in our SNF drill.
View attachment 8128
the reason being that once they pull back from this position,
And get the feel of overlap, separation stretch whatever you want to call it, then you can have them start from a stance, and have them sit, "get sat" by coiling forward into the original SNF position, which they now know the feeling of.
Which is the same swing thought you have , the feeling of being pulled, by the lower, and winding of tension.
From the stretch and fire position, I have them EXTEND their hips towards the ball, so from "sat" which contains some hip rotation, and flex, flexion, to Hip Extension, towards ball, which also contains hip rotation, more or less for both, depending on ball location.
A little contrast to compare hip drive in a different type of swing.
https://twitter.com/UofLSoftball/status/598539503075205120