This is a toroidal propeller for the “Way Over-Engineered Pullcopter”. It's not intended to replace the original propeller, but rather provide another option for experimentation. I have printed this model successfully from PLA and TPU. This model includes only the propeller.

It should print well without supports, but slowing down the print speed is recommended. 20% cubic infill like the original. (It only has infill around the hub.) I use the Arachne wall generator, but I'm not sure it is necessary.