This one is for the crazy people out there!^^
The thread allows you to screw in an PC4-M6 bowden coupling which holds the PTFE tube securely. This is mandatory for using the Enraged Rabbit Carrot Feeder (ERCF) with your V0 or another printer for ants ;)
Also, you can use it as is without the coupling for the rare case when you don't want to print multi-color prints on your tiny printer.
Enjoy!
The author remixed this model.