Added vent area for better back side cooling. seems to help on prints I was having problems with, like any overhang opposite the cooling fan duct.
Rotate the hot end block as needed for clearance, I think it helps airflow around the back also.
If you are CAD savvy and can do some flow work, This might be a good option without big ducts or dual fans.
Could really use some help, really green at all of this.
The author remixed this model.
Added some vent area towards the rear of the duct. this and rotating the nozzle block 20 degrees or so seems to help with overhangs on back side of print.
Some CAD hotshot could likely make this way better, that's not me. Please dig right in to it.
Didn't want to loose view of the nozzle or hinging of the fan.