Print in TPU, no supports. I personally use the 20mm version on the Pavo Pico.
The author remixed this model.
I had issues with print breaking, so I made it a bit stiffer. I also made the side holes slightly smaller in order to mount better so that camera doesn't move up/down on itself.
I've added 20mm version also, which fits better on the Pavo Pico I have ( and probably other drones).