I loved playing with the one-sided version of the nautilus gears and wanted to make a few improvements. I replaced the caps with threads and nuts, and made a couple versions where the base is easier to hold. The nuts can be secured with glue, or by coupling them to prevent unscrewing.
Thanks to MishaT for the original gear model, alex80it for the one sided version, j1vvy for the idea to add threads, and mike_linus for the bolt library.
2x or 4x "Nautilus_Nut_Thin.stl" (you can lock together a pair of nuts on each post to prevent loosening)
1x of either "Nautilus_ThreadedBase" (Thin will print faster, Fancy is easier to hold)
Note that "Nautilus_ThreadedBase_Fancy.stl" has cylindrical voids to reduce material, which also provide another place to grip.