Extractor fan for CNC LASER cutting with 2020 frame and enclosure mountings

I designed this enclosure for an Arctic Air 80x80x25mm PC fan, so I could use it to help remove smoke and fumes when LASER cutting materials on my cheap Chinese CNC machine. The CNC has a 2020 aluminium extrusion frame, so initially I made a mounting to place it on that, but later adapted it for a simple enclosure. The enclosure mounting does a much better job of extracting fumes, but I've included both types of mounting here for you to choose from.

The fan case is designed to fit around the