Avalon 741 Fan Duct & Mounting Brackets

These are parts for an Avalon 741 Miner. The fan duct was created for noise reduction. These things have really loud fans. By adding about 4' of 4" dryer flex duct, the volume was seriously reduced. There are a couple of other duct designs out there in the Thingiverse. One was way too thick and heavy, and used 16m of filament. The other didn't fit any known duct size, either US or metric.

The mounting brackets have versions with screw holes that go on the bottom, and versions without screw ho