Ender 3 - 4020 Blower

On both of my Ender 3's the fans for the nozzle cooling died.
So I decided to design a simple nozzle cooler for a 4020 fan.
My 4010 was usually adequate. But I want to try it with a 4020. Maybe it will help with overhangs ;-)

I printed it with ABS because it is temperature resistant and because it can be printed without nozzle cooling!

-- 27.10.2021 -- Update --
I have improved the design again:
- 1mm higher air duct
- radii to guide the airflow better
- small enlargement (0,1mm) to fit even better on the fan