Small pots to hand on 1" (25.4mm) railing. Still being tested for durability but so far they are working just great. I would not recommend heavier plants.
Standard 0.2mm printing parameters or whatever works for you. Use PETG or something that can be out in heat, sunlight, or other outdoor conditions.
Requires supports. I printed with pot upright and supports under the mounting parts but should be fine to print upside-down with supports too.
EDIT: 7/28/24 Added attachable saucers. Still in testing but so far it fits.
The author marked this model as their own original creation.