I printed this prototype version on my mini Kossell: warning it's a bit too big to print properly on a 170mm diameter bed and I had to remove the z-probe retract tower to avoid a clash with the hot end.The print is currently under re-design, up-to-date & incomplete files are available on my Github (https://github.com/pittance/compressorFan)Prototype files on Google drive (https://drive.google.com/folderview?id=0B4LxDtVkGmNkfkhlNWJrSV9uNlFKUERhTEdBLXkzM0NiQW14MHEzWjJ4dm96...) because Youmagine won't let me upload anything bigger than 1Mb.Desk fan similar to the one I bought as a motor donor http://www.argos.co.uk/static/Product/partNumber/4251800.htmAll built in OpenSCAD with Inkscape