Replicator 2X active cooling fan duct - side discharge

This is an active cooling fan solution for the Replicator 2X. It is similar to the design by ten13th. It does not require a custom fan guard and has an optimized duct geometry to redirect flow towards the work-piece. It is secured in place with two of the long hex bolts from the extruder, and the fan is secured to the duct using the bottom 2 screws.

The cooling fan has a smaller profile than the front-discharge design (please see my other design). The cooling fan is powered by an external po