https://hackaday.com/2019/02/28/threading-3d-printed-parts-how-to-use-heat-set-inserts/ (https://hackaday.com/2019/02/28/threading-3d-printed-parts-how-to-use-heat-set-inserts/)
https://www.youtube.com/watch?v=G-UF4tv3Hvc (https://www.youtube.com/watch?v=G-UF4tv3Hvc)