This was the companion paper:
http://www.chiefdelphi.com/media/papers/2321
After we did our analysis, we felt that it was such a simple and powerfull tool that we should share it. I don't like giving away too much as then people assume its easy. So I wrote this companion and posted it up early in the season to get people thinking.
As an added bonus, it makes a pretty neat flip-book!