What makes this extra cool is that all of this is 3D printed as one piece, there is no assembly required!
I will show you how I designed this, step by step (plus why I did it that way), using a mechanical 3D modelling CAD tool called Onshape. I will focus on the things that showcase the power of a “parametric feature based modeling” CAD tool, and how it eliminated some of the problems me and other people have faced with other similar designs. When I modeled this design, I paid extra attention for the dimensions to be adjustable without compromising the 3D-printability of the design.
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