About this 3D model

I saw a few around and modeled one on richgain's version. It's two parts, the duct and the bracket. You might need a different bracket as this one is made for a Greg's extruder. But if gives 16mm or so of adjustability in height for different hot ends. NOTE: I have been told this will not work with Prusa V2, refer to the comments. Inside I have ducted about 30% of the air to the side the fan is on and the other 70% around the revolve to blow from the other directions. I based it on a 60mm fan because that's what I had on hand.