This is my remix of @Ohio_272698 's fan duct for the anycubic kobra. My main changes were adding bolt head cutouts (the original forced my bolt heads into the plastic, breaking the holes off) and cutting the side of it to make it fit. I was having issues with it fitting without these changes. (these cuts are illustrated in the pictures with an allen key as a pointer).
I added a little line of Krazy glue along the back for extra insurance, but this is not necessary.
The author remixed this model.