I have the ruler, and also have printed off different patterns that have different numbers of pieces in the plates. The ruler I think has 20, and I have printed some that have 12, 10 and I think 16. The angle for each is a bit different. I started cutting some many years ago with scraps of fabric using a printed pattern that I transferred to plastic. I have also bought the ruler that has a much different angle. That will be much easier to use than the template that I have.
When I get a chance, I will see where I have printed off some of the patterns, and share the links.