Filament / Dust Filter

Yet another filament dust filter here. The best one, if you ask me!

• Simple snap-fit design
• No screws or other fasteners needed, only the printed parts (and a piece of sponge)
• Can be hot-mounted onto a filament without fully reloading it (i.e. you could snap it onto a filament at any place; you don't need to thread the filament's open end through it)
• Fully parameterizable design with a FreeCAD source attached

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