[EdZ]

What this is telling me is that if I have my current grip + left wrist rotation then everythings going left into the bushes?

Only if you are executing hinge action as a swivel.

Hinge action is in effect from impact to separation. With the stronger lead hand grip, your 'finish swivel' happens AFTER the ball is gone. That said, you can still execute a horizontal hinge (closing only), with the stronger grip, you just wouldn't want to execute a 'release swivel' - then you'd be headed left.

Horizontal hinge, to me, feels like a very 'level' left hand frisbee toss. Important not to confuse that feel with the 'roll' feel of the release and finish swivels, which is easy to do if you are using a weaker grip, it tends to feel like one long, SMOOTH roll.

This is a confusing point in TGM definitions of hinge and swivel, which Yoda has helped clarify for me.