I made some new ducts with help from AI in Fusion 360. I'm not sure if they’re better than the original ones, but I did a water test. It looks like they blow harder right under the nozzle, but also a bit more behind the nozzle compared to the stock ones. Maybe not better, you guys can try it out any way.
Only work on stock Ender 3v2 hotend
The author remixed this model.
A different type of design and air flow of the duct