After printing and using MSchwarz's model for a while, I noticed the top cooling fins get little to no air movement, so I decided to spend a few minutes in cad and change the piece a little bit. The duct widens as it gets to the fins and provide air for the top fins as well.
Update: Added a V1.5 version with airguide. I haven't noticed any real difference between the 2 designs.
The author remixed this model.