E3NG Bigger Bed Fan Duct

Disclaimer: right of the bat, this file is a little rough around the edges, but it works. The original bed fan duct caused an issue (in my setup) where the lack of airflow caused a vacuum in the duct, which caused the fan to blow air towards the bed regardless of orientation. So I decided to modify the original file by dropping the fan down 10mm and moving the ducts out 5mm each to allow for more airflow.