I have worked on Stationary Head, flying wedges and right forearm takeaway which has helped my swing immensely. Another component I have worked on recently is foot action and I think this has corrected several faults at the same time.
By ensuring the right heel moves only when it is "pulled off" the ground and no more than required, I find that my swing is much quieter in that it doesn't have the excessive body motion I was prone to before. I was taught to "lift" the right heel off the ground to transfer weight, and I believe this method was the main reason my swing wasn't as effecient as it could be.
With this change, I am aware of the contact my right heel has with the ground when I make impact with the ball.
Ed,
You are working on exactly the right things in exactly the right way. And, you are doing exactly what Homer said to do: Namely, you are focusing your initial efforts toward building an efficient, effective Golfing Machine on the end closest to the the ground...The Feet.
You're well on your way now. Stay with it!
Ed,
For a visual aid, go to the Gallery section on this site. Look at the picture under the Swamp. Not sure who the old dude is in the picture, but he's giving a nice demo of what your describing.