This is designed to mount a Unifi Express Gateway to a 10in server rack. It doesn't need supports, though it will require bridging, and will be a fairly snug fit. After printing remove bridging on the back to make room for ethernet and power cables.
Print Settings:
Layer Height: 0.2mm
Wall Line Count: 4
Top/Bottom Layers: 6
Infill: Zig-Zag (Rectilinear) at 40% density
The author remixed this model.
Modified to fit the Mod10 server rack (https://www.printables.com/model/1225275-modular-10-server-rack-mod10)
Changed to insert gateway from the back to sit flush with the front.
I have also created a mirrored version, to move the keystone jacks to the right hand side.