FLSun V400 Column-Mounted Filament Guide

Print in the STL orientation, no supports needed. Brim might be good (I did not need one but YMMV).

Pull through a piece of PTFE tube to act as a smooth guide for the filament, and insert a plastic bowden clip & collet to lock the tube in place.

Clips can be bought here: https://www.amazon.com/gp/product/B0C7QBHN9B

Remove the metal endcaps from the top of one of the printer's columns, and mount the guide using the same screws. The model allows the official enclosure's panels to operate freely.