Filament guide for Snapmaker

With Snapmaker 3in1 3D printer, spools that are sold with filament filled up to their outer edge tends to unwind out of the bracket and get stuck when dragged into the nozzle.
This filament guide ensures that the filament gets unwound in the plane of the spool and that the print goes smoothly.

Edit: an additional guide has been added to reduce the bending of the filament at the inlet of the printing module: https://www.thingiverse.com/thing:3142392.