Extruder Vent for Craftbot 3

After many iterations, I finally finished making air vents for both extruder on my Craftbot 3 machine. It fits a 5/8" O.D. hose. All STL files are oriented for printing and only minimal supports are needed (check against photo 3). When I used S3D for slicing the default 2 wall setting behave as a 4 wall layer for many of the thin sections. The upper halves have a usage hole and a non-usage hole to control which extruder get to be vacuumed.