Summary One ruler to ring them all. (Or something like that.) With this you can make rulers and scales for a wide variety purposes. The most obvious being a regular 30cm/12in school ruler (school_ruler.stl is attached if you want that), but you can do pretty much anything you can imagine: LEGO units, drafting scales, etc. Also, you can alter the counting direction and number orientation, so you can use this for all sorts of jigs and tools. See depth_gauge.stl for one example. Known Issues The customizer is currently flaking out. I have no idea why. I fiddle around and eventually it works, but I haven't yet learned what the magic sauce is to fix it. You can either: 1) mess with it until something works 2) download the openscad file and run it manually