Hi, if drawing sub-millimeter distances exporting in mm to an ascii stl file importing in Cura it reports extraneous surfaces and the 3D printer will not start. I experimented with all kind of Sketchup Model Info settings but to no avail. Only drawings using 1mm resolution are accepted by Cura. I wonder if it anyway is possible to print submillimeter surfaces?
If you model in m pretending they are mm [switch off the units suffix], then export the model into Cura… whilst fibbing about the real units… does that help you ?
It also sidesteps around the ‘tiny geometry issue’ ??
What TIG says, but in general do the model big enough to do well in SketchUp, then let Cura do the scaling.