Filament Guide for OneUp/TwoUp Original Extruder Housing

Filament Guide for OneUp/TwoUp Original Extruder Housing.

As is. The holes for the 2 screws were not initially intended in the design; I've drilled them later.
The big square hole is for the sake of peeking and heat exhaust.

This is my first design on Thingiverse! I am open for suggestions and advices.
Thank you!