Stackable Interlocking Trays - Left/Right with Flat Sides

The original model was awesome, but I missed having single sided options so I could put only two together without the extra interlockable parts at the sides or to put the original one in the middle in addition to one left and one right part to form a triple design with flat sides.

So that is what I made, a very simple but effective remix.

Thanks to the creator of this trays. I am using them to have a tidier workspace and they work really well.