I'm using Nophead's great mendel90 project to build a larger version of his machine. Everything works as expected except that the Openscad's output DXF's do not output circles for holes but instead output line segments approximating circles. The 2mm circle (attached) is generated as a 13 sided figure. The dimensions are correct in that if a circle is generated from the vertexes the diameter is 2mby Miamicraft - 3D Design tools