There are two 3D printed parts for the turntable: the electronics enclosure/base and the turntable platform. The enclosure has a snap fit back to easily access the electronics. I followed along with the Ruiz Brothers' tutorial for snap fit enclosures that you can find on YouTube here:
The enclosure also has cutouts for the USB micro B extension to poke out the side and a spot for the servo to stick out of the top. Holes are in the front for the potentiometer and switch. The hole for the switch also has arrows above it to denote that it's switching directions.
The entire design is parametric, so you can adjust it to (literally) fit your needs, whether you need a larger slot for a motor or want the enclosure to be bigger or smaller. You can download both the Fusion360 file below or the .STL file from Thingiverse.
For printing, I printed it at .2 layer height and 20% infill. You do need some supports because of the USB and servo cutouts, but if you're feeling brave you can certainly try it with no supports.
The turntable platform is also designed to be parametric and is available in the same Fusion360 file. The base fits perfectly around the circular disc that comes as an option with the servo motor. The point of this design is that you can print multiple platforms in different filaments, or even different shapes and sizes, to fit different needs you may have for various b-roll and photography situations.