The SVG of the control layer must be flipped for correct milling. Currently 3DuF does not do this. ### Current 3DuF Control Output Example <img width="511" alt="3duf svg control" src="https://cloud.githubusercontent.com/assets/4683301/25300457/e0e2d632-26dd-11e7-9bef-8c905883699c.png"> ### Correct 3DuF Control Output Example <img width="511" alt="correct svg control" src="https://cloud.githubusercontent.com/assets/4683301/25300458/e0e30b98-26dd-11e7-9ca7-83ab3a4d392d.png">