I realized that the HF boxes fit quite nicely into surplus 19" racks, which are pretty readily available second hand and so that's the direction I went as it was very fast and easy.
I also bought a few for the kids' Lego, but I use most of them for electronic components, mechanical components, screws, nuts, etc. I've inadvertently knocked over closed bins a few times without spillage (similar to the demo in Adam's Sortimo video).
I suspect this is a another case of more than 80% as good for less than 20% of the cost.
I'm on my way home from re:Invent at the moment, but will put a tape measure on it when I get home. The 19" dimension on server racks is not the inside clearance, but includes the rack "ears" dimension, so 16.5" wide to fit inside the clearance between 19" rails sounds like it's probably the right thing. Shoot me an email (in my profile) if you need any pics or other confirmation.
Interesting. I did a DuckDuckGo search on the boxes he used (Sortimo) and this blog post [1] popped up on Allit which is suppose to be a cheaper alternative to Sortimo.
I use something similar from Raaco for my (kid's) Legos. Same grid layout with inserts that lock in place with the lid (no migration of contents if you hold vertically)
Which are nowhere near as nice, but they're $5 each instead of $50, and I don't have Adam Savage Bux.
I've got a number of them, and I'm looking for a way to make (or buy for not much money) a shelf to hold them like those shelves of Adam's.