High efficiency Extruder Cooling Duct for the Anet A8 Printer

I made this air conveyor after trying all those other makers have proposed. I have seen that the other conveyors have internal holes with very large spaces, this produces a lowering of the air pressure at the outlet of the ventilation holes, with the result that the outlet air pressure is very weak. Many owners of Anet A8 have also replaced the fan of the extruder with a larger size, this to increase the airflow. My project changes the paradigm, ie there is no need to increase the size of the fa