These parts enable mounting the Articulating Raspberry Pi Camera Mount on the base extrusions of the i3 MK3.
Just print with default settings without any supports. I like to use a 0.15mm or lower layer height for better definition of the top circular sections, but I guess this is not really required.
Use two (2) 14mm M5 x 0.8 Hex Drive Flat Head Screws to attach to 3030 M5 T-nuts (such as https://www.printables.com/model/64627-3030-m5-drop-in-t-nut) within the rails.
The author remixed this model.