mElephant fan dust
The .scad file here is just a quick and dirty script. If you want to modify it, you need to download "GEEETech_MK8_Printhead_Fan_Shroud.stl" from GEEETech_MK8_Printhead_Fan_Shroud.stl.
When using my .scad file, "GEEETech_MK8_Printhead_Fan_Shroud.stl" need be repaired before rendering by OpenSCAD.