I added some 2D pictures of Sketchup models, with annotation, to try to explain how the calculator worked more clearly. It was a difficult day waiting for downloads and phone calls, so I filled in the time adding a random-woodworking-aphorism feature to the rising gate calculator. Some of the sayings are my own, and some are from here and here and here.

The source for the Rising Gate Calculator is released under an MIT licence at Github. I may be foolish for releasing it without trying to make any money, since I can’t see it anywhere else. However, I can’t imagine this technique hasn’t been familiar to every carpenter since the time of Pythagoras, so, for better or worse, it’s out there as free source, in all senses.