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I haven't tried 3d printed needles (latch hooks) for these machines. i purchased my needles from Angora Valley https://www.angoravalley.com/sockmachines/accessories.html#Needles
They do sell 10 gauge needles, which do fit these cylinders. I had a customization option for needle size in the cylinder model, but don't remember whether it got commented out in one of my revisions. I have a new revision ready to post that I'll get to in the next day or so, and I'll make sure that needle size is available. If you print a cylinder with fewer slots and use larger needles, it should knit with larger yarns (probably not with anything bulky, but larger than sock yarn anyway).