@mbellon Yes, I use OnShape (love it). For the surfacing job I seriously just opened a new project, made it a 8x8 square, saved it as a DXF and imported it into MeshCAM. It looks fine in MeshCAM, dimensions are good, etc…but it doesn’t export the G-Code as expected. I won’t be able to try your STL this evening but will try to do that tomorrow. Thanks!