Like many others before me, I discovered that my IKEA Alex desk drawers are almost perfectly 7 gridfinity units wide, but in length they're not such a perfect fit: 12 units deep, but with 16mm extra space (in my case – apparently it varies from one desk to another). Some people settled for spacers that would simply prevent the baseplates from shifting around, but I wanted something better. After all, it's not gridfinity unless you cover Every. Last. Millimeter. Right Zack? (That's the “finity” part after all.)
There's already some half-size bins out there (like this and this) but I couldn't find any half-size baseplates; there's an assumption that those half-size bins will get installed in pairs on a full-sized baseplate. And half-size means 21mm — still too much for my drawer.
So I did a bit of hacking on the source code for kennetek's OpenSCAD Rebuild to support generating bins and baseplates with a smaller size in one direction. And since not everybody's drawer will be the same, I generated a bunch of bins and baseplates in several dimensions: 21mm, 19mm, 17mm, and 15mm. Since there's only so much you can do with bins this small, none of the bins have a label, magnet holes, or a lip (but they still stack decently if you really want to). I also limited myself to a single height of 6U, which should be decent for most uses.
The author remixed this model.