Dear #3DPrinting people who are familiar with #CAD
Upload your "stupid" models.
There is nothing special about this "dumb" tray. It's just a five sided box with filleted edges, but it's been downloaded 79 times on Printables.
Lots of folks have 3D printers but don't know how to model things in CAD.
79 folks either got something useful they didn't know how to make themselves, or had time saved by not having to model it themselves.
Your "stupid" models are worth uploading.