[airair]

Hmm?

A Left Arm Wedge can Only exist with a Flat Left Wrist. The purpose of the Left Arm Wedge is "Rhythm". And you cannot "Roll" with a Bent Left Wrist. I mean that you will not, cannot, "Roll" until the Left Wrist Becomes Flat.

But what's the problem?

If your Left Wrist is Cupped at the Top, or during the Downswing, or at Release, it will "Flatten" during the "Uncocking" motion. Alas, the Left Arm Wedge becomes established while "Uncocking". Then you'll "Roll" with a Flat Left Wrist. No big deal.

Let me give you some hints. "If" your Left Wrist is perfectly Flat at the Top of the Backstroke, then your Downstroke will start with the Left Hand aligned as though you will "Karate" Chop the Ball. But, if your Left Wrist is Fully Cupped at the Top of your Backstroke, then the Left Hand is Aligned so that the Palm of the Left Hand moves directly toward the Ball. So,,,,you can have varying degrees of Cupping. Simply vary the Amount of Karate Chop or Left Palm aiming. Either way, the Left Wrist will be "perfectly" Flat at some point in the Uncocking motion (depends on how much cupping you have) and you'll have a Flat Left Wrist to "Roll" into Impact.

The problem with most Golfers is that when they have a Cupped Left Wrist at the Top of their Backstroke the Downstroke proceeds with a Karate Chop Aligned Left Hand. That ain't ever going to work. Just remember that the Uncocking motion should not disturb the Alignment of the Levers: So, Flat Left Wrist = Karate Chop,,,Cupped Left Wrist = Left Palm toward the Ball.

I can't get into details because it's too time consuming, but suffice to say that this is the way one determines and varies the amount of Mass or Velocity one delivers into Impact. Flat Left Wrist at Release maximizes "Mass". Cupped Left Wrist at Release maximizes "Velocity".

If you want a full explanation of these concepts, a demonstration of their differences and practice drills then please watch my soon to be posted (Within a few months - maybe) video.

I think I have read that a cupped LW at the top of the backswing is something slicers often do...
Looking forward to your video.