[whip]

Current swing keys

Keep head still no swiveling or tilting with the neck, practice with a tee between teeth, seems simple but don't let the picture you see at address move around

Feel like chest stays high, proud posture, as tall and close as possible

Extensor action

Stance / shoulder alignment check

Ball position check

Passive right arm, left arm swinging action only

Swing radius shorten up overall length

Constant hand speed, effortless motion

Soft legs