I needed a tray to store my cables under the desk.
The tray is hinged (you can either use a hinge on each side, mounted with one or two screws, or use the double hinge in the middle if you install several). to have nice side clips just mirror one side in the slicer
the oposite side has a clip so you can undo one side of the tray to fully load it.
I printed it with PLA on a Ifactory3d One Pro and Prusa XL for the hinges. The hinges need no support at all.