[cometgolfer]

Thanks to all participating in this thread. It's lifted a river(boat) of fog for me.

Special thanks to Mike O who made me feel a little less stupid regarding my frustration and confusion with the different use of "paddlewheel motion" throughout the book, and for a very interesting perspective on the construction of the book. The more I come to understand it, the more I respect the genius of Homer Kelly.

CG