Anycubic 4Max 85mm Circular Fan Duct

Uploaded 2 other designs before, I was using the fang type fan duct and it was working quite well, but because of the fangs I could not use a belt tensioner for the X carriage belt, I also got a silicon nozzle sock and because of that the fan duct was cooling the nozzle to much, did couple PID tunning runs but did not help, besides my X belt start to wear and needed a tensioner, so decided to design a big circular fan duct.

After 4 prototypes and testing I ended with this, it has a support so