The Honeycomb Storage Wall looks a lot nicer if you put a frame around the edge. These end caps are glued on (I used a glue gun). They don't perfectly line up on the corners, but are good enough for my use.
The author remixed this model.
I found the original design a bit too complicated - I wanted something fast and easy so combined some of the parts and made them into a single horizontal and a single vertical version. They don't perfectly line up at the corners, but it was good enough for my use.