Prusa i3 MkII Extruder Fan Filter Cage

This is a filter cage that fits the 50mm x 50mm x 15mm horizontal flow fan that the Prusa i3 MkII has. I was tired of having to clean the fan blades as often as I did (I have cats - and a dusty house apparently) so I designed this cage so I could wrap some filter material around it and catch the big stuff.

After using it a month, I must say that it works well. It stops the cat hair and larger bits, but the talc type dust still goes through (this is not surprising since I am using [pretty