Anet a8 Double fan duct with stock fans

I'm the worst 3d modeler so don't expect much on this one.
This double fan duct works ONLY with this bowden mount ( https://www.thingiverse.com/thing:2193695 )
Needed:
*4X m3/m4 nut and bolt to fix the fans
*2X 50mm Fans (like the one you get with the printer)
The fans i used make a lot of vibrations but it seems that they don't affect badly the print quality.
I did a 2CM to 11CM bridge test at 60mm/s with fans at 100% and it came out pretty good. I did the test with fans at 50% (check