@Mschatelaine @davep @cstross @Phosphenes @mwl I've been recommending this manual for ages as a way of boot-strapping workshops: https://web.archive.org/web/20121014094321/http://www.fablabamersfoort.nl/en/page/fablab-instructable-0 but then I was shown this vid: https://www.youtube.com/watch?v=yWjbQksE0GE I didn't know that the designs had improved so much. I could see the use of drones to take out tank regiments by destroying their supply chains, especially in Macedonia, but I hadn't realised that the printed designs had improved as well.