Poor Man's "Sortimo" System

If you haven't seen Adam Savage's "Sortimo" system, then you might not want to... because after you see it, you're going to want one of your own.

Unfortunately, each box is on the order of $75-$100 and I can't imagine what Adam's entire rack cost. See his setup here:
https://www.youtube.com/watch?v=1OPSbF6kM9k

Harbor Freight, sells a knockoff box, that while not perfect, does the job nicely. Unfortunately, each box comes with a preset assortment of bins:
http://www.harborfreight.com/19-bin-portable-parts-storage-case-93928.html
(There are also larger, double height sizes, and a half width smaller size as well)

I wanted more small bins, so I decided to print my own. If I design other sizes, I'll add them to this thing.

**UPDATE** [I recalled this person](https://www.garagejournal.com/forum/showthread.php?t=257593) on garage journal used a bun pan rack to house his Harbor Freight boxes. I decided to do the same. I couldn't find a second hand one, so I just