The thing is, that impact position with ball forward of center, hands past the ball, head well behind ball AND weight on left leg/hip and the degree you can pull it off has a lot to do with physical ability and flexibility.
I'm betting for some, the only way to have weight left and hands forward will be to have the head and upper body covering or almost covering the ball at impact.
Can you pose in a more or less good impact position? If you can, then I bet it's not flexibility issue. I used to think the same and now I know it was not the case, at least not for me.
In my case (and it's still work in progress, probably for ever):
I had to learn to pivot better. I was not capable isolating rotation of shoulders and hips. Sitting down keeping hips stationary my shoulders would rotate only about 30deg. I thought that it was a flexibility issue, when in actual fact I was not using the right muscles. Now I get shoulders to rotate about 60deg. Definitely flexibility issues still, but what a difference in just by learning how. Same thing rotating hips while keeping shoulders stationary. I'll never be a belly dancer, but at least it moves now.
I was trying to get more axis tilt in downswing by sliding my hips left, or even setting them left to begin with, so much that I was restricting hip rotation. Pressure was getting to the outside of my left foot too early. I had to feel that my left leg would resist hip slide and try to get axis tilt by pulling right shoulder down instead. Also added letting right knee move forward, which I was holding back too much. Btw. I do think weight should be on the left leg at impact. Dynamics in a good swing put pressure on your left foot, but static weight distribution is very much on the right foot.
I could not get my hips open at impact whatever I tried. I was always coming a bit over the top and hitting fades. Finally what helped was a feel at start-down that I really kept my right shoulder back while pulling it down, so that my overactive hands/arms would not kill my chances of pivot working. My arms just needed to be so much more behind my pivot than what I was used to. I felt scary in the beginning - how can I hit the ball from there?
I had been able to do it quite a while with very short swing, like what Brian demonstrates in the Flipper, where you hit with pivot only. It just always fell apart with anything close full swing.
Head forward is a symptom of some these issues. You're trying to hit the ball and not turf before it, so body moves forward to guarantee this. I played one season with extreme version of this. I was able to hit the ball first most of the time but divots were very very deep. I think the overactive hands/arms do the same - afraid to hit it fat, so they do their work instinctively.
I've tried to find the right perception of what really should happen during the swing. To me this perception is how body, arms, hands and club move looking from my eyes. For a long time this was totally wrong. Now I think it's better. Now the good shots start to come almost right-away, when before it always took quite a while to find it. And the good shots are much better now than ever before. And I can be head back, without hanging back.
