StarTech dual 3.5 HDD Raid to 120mm external fan ducted conversion

I got a raid box with good performance but the tiny fan in the back was way too loud so I converted it to be cooled by a quiet 120mm fan I happened to have. The 2 pieces make printing easy and duct curve allows access to the controls and ports. I glued the 2 pieces together and mounted it to the top of the case with double stick tape.

The bridging of top and bottom arches on the duct printed ok without supports. I happened to use PLA+ filament.