[EdZ]

Squeeze the last 2/3 fingers of your left hand and roll them forward, as if you had your hand on a motorcycle grip, as you start your downswing.

This will give you a bit of the feel, but be careful not to swivel as your hinge action, you want that "back of the left hand faces the ground" feeling AFTER impact.

Also, keep in mind that the swinger's release is a sequenced one, the uncocking, then the roll.

The move above should start you getting the post impact feels. It will tend to get you in an arched position, which is certainly better than a bent one.

I believe Hogan made that move, based on my studies. And Jim McLean reports in his book The Slot Swing, that Mickey Wright used it as well. (as previously discussed in the book Hogan's Magical Device)