Ender 3 Cooling

I made this in an attempt to address some issues I had with the stock cooling setup on the Creality Ender-3. The 40mm axial fan that cools the hot end dumps a lot of air out the bottom of the metal box, which was causing some issues for me when printing PETG on this printer. All that airflow hitting the bed and print was lifting the first layers, much like trying to print PETG with the cooling fan on high for the first few layers. ;) I wanted a duct for that fan that snaps onto the heatsink to f