CR-5 Part Cooler

Remixed version the other Part cooler. That one results in a duct that is pretty much at the same plane as the print nozzle. All this does is shrink the bottom of the duct slightly and create a flat bottom.

This ideally needs a little more tweaking, as the airflow hits forward of the nozzle, but with the OEM fan, it is certainly a step up above the default duct.