Raspberry Pi 4 1U 10-inch-rack-mount bracket

A bracket to mount the Raspberry Pi 4 in a standard 10-inch server rack. This will fit 3 RPi 4 units using Power Over Ethernet (PoE) in a 1U.
This is a remix of this original 19-inch rack-mount-bracket by russross:

https://www.thingiverse.com/thing:4125055

I've adapted the rack-frame to the required width, ears and tray are identical to the original files. As in the original the parts can be assembled via an M5 threaded rod.