A swimming question for Total Immersion folks.

I bought and read Total Immersion a few months ago, loved it, and immediately started doing the drills. I am very happy with the results. I feel more comfortable in the water, have gotten faster, and am swimming farther than ever.

At this point in the evolution of my new stroke I've developed a question and I am hoping that some of you could help me out. I went swimming with a friend who is a very good swimmer. He was a part of his high school swim team and has continued to swim these ten years since high school. I asked him to check out my stroke and he said that he thought I was rotating too much; that my body role was too exaggurated.

Here's the question. How do you find the right amount of body role? How do you balance the feeling you get during the drills when you are encouraged to "point your belly button toward the wall", and the feeling that you should have when you are performing your stroke? How much body role should you actually be executing?

Thanks for the help!

P.S. I know you guys love to hear about mile stones, so I'll share a small victory with you. In December I could only swim the crawl for 50 consecutive meeters. My workouts consisted of 10 50's. Two weeks ago I swam 2000 meters (a 400 warm-up, and a 1600 meter swim).