[Daryl]

So what's the difference between flipping the hands and a flip release? I've always associated the two.

Anyway, I took a look at a few other slo mo videos of Sergeo. I can now understand why you regard it as a flip release. There's a sense of an independant club motion in there. A rotation component that isn't fully backed up by the arms swing. Sign of a chicken wing through impact, almost if he is tempoary shortening his left arm to take up the slack from a flip. I didn't expext to see that. I didn't see it on the first video I examined either.

It looks flippy face on (6 o'clock). And also from slightly behind ( 7.30). But from 4.30 it doesn't look like a flip.

I think that you make a very good point. The Flip may create some slack and the Left Arm manipulation that you're observing may be an affect while trying to "Time" Impact.

I may have spoken prematurely about Sergio, but whenever I see an out of Line Primary Lever at Start Down, I immediately think and look for a Flip Release.

Anytime the Shaft and Clubhead are Radially out of line with the Left Arm and Left Wrist, a slight pull with the Left Arm will cause the Clubhead to get in-line. Thus, when we, at Start-Down, try to leave the Hands at the Top, we are Aligning the Left Arm and Clubshaft while taking out the Slack.

Sergio allows the Clubhead to Drop Slightly below the Hands at Startdown and then, when ready, he pulls the Hands strongly downward. Typically, the force is strong enough so that rather than the Clubhead simply "getting in-line", it creates CF and causes the Club to Release. "Flip Release"

The Clubhead races to the outside. This is "Timed" to get aligned by/at Impact.