This adapter serves only for aesthetic purposes.
The truth is, I couldn't find a way with sufficient focus for this machine's body. What happens is to have a focus, the lens would have to be closer than the body's own entry point, which is not possible.
To print in the best way, I suggest using an activated support, but it's not necessary in the thread area that fits into the camera body (see attached image).
The author remixed this model.
Used just the threads, and added all the necessary parts to fit on the Nikon Lens. For the nikon lens I used also the measures from this model: https://www.printables.com/model/274372-nikon-f-mount-to-cy-mount/files