When I began working through the Dulon, Master Nonymous gave me this:
"The set is very linear so think of a hallway that you are moving though."
If you like, take a look at the thread where I described my approach to tackling this ... I tried to do some footwork diagrams. They were meant as a help for memorizing foot positions (as I have never before worked with martial arts concepts), and they're very "amateurish" for sure, but they do show the general linearity of the Dulon (with some zig-zagging around the line for sure!). I ruined a fine and very linear strip of grass while practicing it ...
Maybe you can show us your progress in a video soon, too?
http://www.saberforum.com/index.php?topic=11117.0