My old vent ring duct was made out of PLA and was starting to sag a bit after a couple years. I liked the airflow from CarstenD's design with the containment of the turbulent air from 3DDP's design, so I used my extremely amateur Fusion 360 skills to slice and dice the meshes into something that seemed to make sense.

I ended up chopping a little of the bottom off of CarstenD's design so that it would sit flat with 3DDP's ring. It seems to fit pretty well and flush on my CR-10 S5. Looking back on this, I definitely could have done a better job lol.

Originally printed on an Ender 3 Pro. I briefly used this on the E3P, but was mainly used on my CR10 S5 for a couple years until I had a print failure that yanked it off the assembly.