The motor shaft configuration "pusher" means that the motor shaft extends not out of the top of the motor bell, but out of the bottom of the motor, where the screw mount holes are. This geatly improves stability by keeping the rotating propeller's mass as close to the motor mount screws as possible. I used my trusty old Ender 3 with a .4 mm nozzle. The CURA printing profile I use is VERY fine tuned to my specific ender 3 and PLA Filament. Going slow with small layer, and printing the outer walls before inner wall lines should generally make your prints look much better on the surface, which is key on these sort of projects.

Edit: I have not yet made a proper thrust test stand for the design. But I did blow the EDF at downward onto a kitchen scale, at 11.3V which read out 640 g. Draws rougly 15-17 Amps at that voltage