DIY fume extractor shared by sparus on Thingiverse:Made it for a Nidec 120mm fan (38mm). Probably won´t fit slimmer fans Recommended Parts List: 2x 20/25mm M5 bolts 2X M5 washers 4x 10mm M3 bolt 4x M3 Nuts 8x 18mm M4 bolt one small 3 position switch (if you want to...