I bought the Milwaukee Packout Low Profile Organizer, and loved everything about it - except the rectangular bin. The fact that it was divided into three sections bothered me, and the fact that it couldn’t be divided along the long axis also bothered me, so I modeled it and duplicated it. I wanted my model to be indistinguishable from the original, so instead of just making something that would work, but look out of place, I tried to make something that just blended in and disappeared.
So, I duplicated the rectangular bin, but also moved the separator slots around so that it could be divided into four sections along the short axis, and also be divided in half along the long axis. That meant that it could be divided in a bunch of crazy ways as well, so I modeled a bunch of different dividers for it.
I also modeled the square bin as well, just in case I wanted “spares” that could hold additional stuff that could be swapped out without having to dump stuff from one bin to another. My bin is completely compatible with the Milwaukee bins. They stack on each other, the separator I made fits in the Milwaukee bin, and the Milwaukee separator fits in my bin.