A20M 5015 fan duct

I designed this fan duct to fit on a 5015 blower fan to replace the under powered factory fan on the Geeetech A20M. I wanted to use the factory cage and still be able to mount the 3D touch. It is designed to work with this mount I designed: https://www.thingiverse.com/thing:3435662

This duct creates a nice tight pattern directly below the nozzle. Here is video of the fan in action: https://youtu.be/NzyEmW-KReA

This fits with just enough clearance for the newer style long nozzle. Pretty su