Well, the information has been out there for more than a decade, but this is a really cool way to represent the process. There are also a lot of faster ways to get past a $5 Master combination lock, so this method is really only useful if you want to deduce the combination of a lock -- for instance, if you found one on the side of the road, or you cared about not only opening it, but being able to open it in the future without leaving an obvious sign of breach such as would occur using bolt cutters or a hacksaw.