Edit:
V2 with a bigger Funnel is now available!
I had issues with my 3d-printed Pipe for the Nextgrinder 64. I had to power off and on the grinder multiple times, since the beans where stuck to the outside of the pipe thanks to the centrifugal force.
With my edit this issues never happend again. I would recommend to print with 100% infill when printed in PLA and note the orientation of the piece in the 3MF File.
The Pipe file is for everyone who doesn't have the recommendend pipe for the Nextgrinder 64.
The author remixed this model.
Made a shaft that collects the coffee beans in the pipe