3D Print posted by danilius
This is a tool for measuring e-steps, using the bowden tube. Slide it into the loops on the main body, clamp in place with a bolt. Slide the other part onto the main body and adjust until you have 100mm between the front of the first loop and the face of the slider. Now adjust you e-steps to get an easy visual of your setting.
A geodesic dome sukkah, more of which you can read about here: http://daniepstein.com/daniepstein/worlds-first-3d-printed-sukkah-well-sort-of/