This is a remix of Ioannis Giannakas 5015 cooling duct. using on my ender 3 s1 pro. i dont know how to use any proper cad programs so this was done in tinkercad. it is not the smoothest shapes but it seems to be pretty effective. and the fan holes fit pretty tight so i dont know if they will work with other model 5015s. im using Makerfocus ball bearing fans. basically am uploading in case someone wants to give it a shot or mess around with the model. will require a zero y offset mounting backplate and 3 m3 screws to mount the duct. the stock fan screws will be too short. im not sure what other backplates will work with this but you can use mine with it which is a remix of tsuga's backplate: https://www.printables.com/model/1406207-ender3-s1-sprite-zero-y-probe-offset-mount you can see in the pics where i painted the supports in orca slicer. (brown and green parts.
*I have updated this model take a look if you'd like: https://www.printables.com/model/1408492-ender-3-s1-sprite-extruder-dual-5015-fan-cooling-d
The author remixed this model.
altered to allow use of dual 5015s