Backpack Part Cooler for FT-5

This is a part cooler for the Folgertech FT-5 R2 (reportedly does NOT work with R1). It mounts the blower behind the X axis belt and closer to the central axis of the X rail, which minimizes the mass hanging below the X rail and as a result, minimizes the wobble during rapid Y movements. The entire part weighs just 32 grams, and the wall thickness is designed at 0.75mm, which prints fine and is plenty sturdy even in PLA. The airflow has been directed internally by turning vanes in order to ac