You're a life saver mate, I was trying to get it to work for like 6 hours, looking up guides and nothing told me I needed a folder for models inside the printer folder. Thank you!
Could just be me being dumb, but for some reason, I can't get 3d models to appear in the 3d printer menu. I've tried making one myself and downloading one already made for the game and neither want to appear, and I'm on the latest version atm which is 0.8.2.