3D printing, especially hobbyist machines, is still in its infancy and produces disappointing results. A large flat piece warps. The resolution is coarse. It ta

3D printing, especially hobbyist machines, is still in its infancy and produces disappointing results. A large flat piece warps. The resolution is coarse. It takes too long to produce even a simple piece. The machine needs constant monitoring. It's at the equivalent of the DOS stage of personal computing. I wrote code to produce STL files. These files are accepted by hobbyist printers. I sent it to a professional shop, they complained one of my triangles wasn't closed, couldn't fix it or tell me which it was. Wonderful.