The original diskbox model is already a great design, but I noticed the cutouts in the bottom case and realised something was missing.
Took a few tries to get the design right, but this seems to be just about the perfect thickness to give enough movement, but still be rigid enough to support the cards. I haven't tested this extensively so I can't tell you how durable they'll be in the long-term, but they seem to hold up just fine. The lip at the bottom is probably unnecessary, but I wanted it to match the little 'bump' you'd see on dividers for 3.5" floppy disk boxes.
As with 'old school' disk boxes, there is a small amount that protrudes from the bottom of the case. You'll need to add some feet to the original model that are at least 2-3mm thick in order for these to work properly.
The author remixed this model.
Not so much a remix, more an add-on. This is a divider meant to mimic the dividers you used to get in floppy disk boxes.