Filament cleaner/cooler box

This is a project I work on.
The goal is to have a filament cleaner box and cool the filament.

FilamentBox
The middle box is for a little sponge. You can use any soft sponge you like to. It will remove some dust, but it will also act as a barrier for the air.

The air box is made to inject air in the box. This air will be forced up in the filament tube. This will cool the filament.
The small hole shall be down to the middle part.

The top part is for the filament tube. it sits on top the air part.
The bottom part shall be under the middle part.

All this shall be mounted so the filament can move free without touching the box.

The top part and the air part must be tight fit so no air will be leaking between them. Maybe you need to sanding them and use glue to fit them together.

AirBox:
The air box is ready now.
The funnel is for 80mm fan.

The middle part is an air chamber. It is made to store and increase the pressure trough the top part.
The top part sha