This filament guide works with up to 12 PTFE tubes, you can push them in and they will hold. The tubes are fed from dryboxes with a filament buffer, now I can just push back the filament and pull out the next colour. Really handy. :)
/edit 01.08.23: Added a v2 with a little lip at the bottom of the hole where the PTFE tube can't slip through.
The author remixed this model.