About this 3D model

These are my changes for E3D hotend on Mendel 90 "Sturdy" variant with LM10UU bearings and T5 belt. There isn't room for the normal fan duct so I put it on the X carriage like http://www.thingiverse.com/thing:157992 . You can use a normal thickness 40mm fan. To fit the E3d hotend, the extruder needs a more shallow indent, so the wades extruder was modified. No openscad file because I changed hot_ends.scad function jhead_groove_offset() = 3.8; The included fan duct has thin lines of support material already included. The Cura support material I tried wasn't removable. You should be able to use http://www.thingiverse.com/thing:91931 to duct air onto your part, but I haven't tried yet.