This is a remix and consists on 3 parts only: left, right and front fan mounts.
The best mount position for the cooling fan would be at the back of the extruder where it does not obstruct the view and allows us to visualize the printing process, but that demands extra parts and workarounds.
The front mount does not offer a connector to the blower to redirect the air to the tip of the extruder, so it does not obstruct the visualization of the printing process. If you wish it's possible to snap this fan duct.
The left and right mounts redirect the airflow straight to the heat sink, leaving the front fan responsible for cooling the printing parts. The front fan is controlled by the slicer.
Using stock fans for both left and right mounts and a DC 12V 0.15A 2 Terminals Cooling Blower Fan 50mm x 15mm for the front.
Printed with PETG.
No rafts, PETG better sticks direct to glass with hair spray or Elmer's glue at 70 degrees celcius.