====== Workflow: DXF to 3D print ======

  * Open DXF in Illustrator
  * If there are double lines it might be caused by infill and contour lines overlapping. Ask the maker of the DXF file to give the infill a different color than the outline. 
    * In illustrator, select an infill or outline object
    * Select > Same > Fill & Stroke
    * Delete
    * Check for errors in outline mode (cmd+Y)
  * Select a shape
  * Put it in a new document (copy, make a new document, paste)
  * File > Export > Export As > Format: DXF
    * Scale: 1 CM is 1 unit (remember this for later)
  * In Fusion 360: Insert > Insert DXF
    * Check that units are set to CM (the same unit as the Illustrator export)
  * Select the shape, extrude
  * CMD + click the object in the tree > Save As Mesh > OBJ 
    * Unit type: Millimeter
  * Import the OBJ file into Cura and check the dimensions. Now it's ready to print