But I like to feel like I'm pulling down with the underside of my left arm....left hand "karate chop" on the back of the ball....then trust CF to square the clubface for me.
It looks like Tong explained that the l. arm actually adds little power...
I suggest you try out my drill!
Per 6-B-4-0, "Left Arm Power" in any form or amount can still be considered #4 Accumulator Action. Otherwise it actually substitues for the Pivot to introduce the circular motion required to produce Centrifugal Force.
Hybrid Mode
