40x20 fan housing to fit the Ender3 V2 with original blower fan (this one still noisy tho, might change that for an other sunon 40mm fan in the future). Made to fit with a 40x20 sunon MF40202V2-1000U-A99 fan (bought on digikey) Noise level of this fan is good compared to OEM and it should last relatively long since it uses magnetic levitation bearings.
added a nice velocity stack to improve airflow and prevent putting fingers in the fan without a restrictive grill.
Fan is fixed tool less with 4 push pins. Holds great
I fixed the part cooling fan and the shroud with some #4 x 1/2 wood screws from the hardware store.
The shroud prints face down with no supports
P.S. added some fins inside the velocity stack V2 to make it stiffer and easier to unstick from the print bed and it should make airflow a little more efficient in the process too.