Grab a book on 3D Design for Printing or get started with the following free design programs: TinkerCAD OnShape OpenSCAD Blender Starting With Tinkercad Tinkercad is a free application that runs inside your
My personal answer is open-source. Whenever possible, I prefer models in OpenSCAD. If you download an STL with ten M8 bolt holes, youcouldwiden them all in a modeling program, but if you’ve got the source code, it’s as easy as changing a single variable. Using the source plays to ...