Ender 3 Cooling Fan

The stock cooling fan that comes on the original Ender 3 is pretty bad, so when mine died I replaced it with a coaxial fan, and designed this fan duct for part cooling. It is simple, and way more effective. I rarely even have the fan speed above 50%, because it moves considerably more air that the stock fan and duct. Uses the same screws from the original fan to mount to the hot end, just need new screws to mount the fan to the top of the duct. Uses a 40mm fan.