the 111mph swing

Looks like a great playing swing...your torso/head stay back more, whereas with the faster swing you seem to move forward a bit. Since your swing is longer and your turned so much you probably need a big move forward to get to the ball. Is your miss when "going after it" to the right?

I noticed your trail leg straightens and lead arm bends quite a bit..is this for a bigger backswing? I wonder what the speed difference/consistency would be if you didn't do this?