A Slightly Improved EVA 3.0 fan duct.

The standard fan duct seems to focus air a little bit in front of the hotend, or at least it did for me. This issue sums up the problem. The original model isn't simple to edit in my normal cad software and I did try to adjust it in OnShape but many of the operations broke when trying to adjust parameters (most likely due to user error). As a result this duct is an amalgamation of efforts in OnShape and Blender to try and shape the duct into something that concentrated air directly under the nozzle. Through trial and error I ended up with this shape. Please understand this is a band-aid for my system until I can find a better solution. If you find yourself in the same boat I'm in this may help until the design is revised or a better remix is made.