Yes. And, Extensor Action should be part of Chapter Six; "Power Package".
The whole darn book should be re-written without changing a single concept or procedure. Color Pictures, Colored Overlays of the Flying Wedges, etc. 600 Pages. 25 bucks. Big deal.
A million Copies will be sold. It would become the standard text book for high school and college. Expanded and including video.
The current Owners can't see further than a Bull in a Cow Barn.
Don't get me started.
Would make a great iPad app similar in execution to the Martha Stewart Cookie Cookbook (uh oh, losing my macho streetcred here...)