40mm fan duct for Infill 3D Direct Drive

Create this duct for better cooling in place, as I don't like the result of the fan clip that in original model. Very cool flow under the extruder even on 30% of fan power.

Version 1.2
Added space, to center the duct. Bigger fun duct, for big airflow.

Version 1.3 Updated angle
You can heat the end with a lighter, torch or heater gun and give it any desired shape