Reduces filament usage and pushes grid all the way to front edge. Back edge has partial slots approximately 36mm (of 42mm) in size. This allows SCAD partial bins to fit and room for parts that hang outside of the GF size.
The original project says the toolbox comes with the 8300. I got mine with a 4300. I believe the toolbox is released with one version approximately once a year (near Christmas?) as a promotional deal. In January 2023, the 4300 toolbox version seems to be on its way out, with many stores listing it “out of stock.”
Something not noted in the original is that on the left and right side, there needs to be space for the lid support arms. It's best to put the circle cutter on the right side since it has extra space for it. On the left side, it's best to put something with low sides, like the sanding bands.
The author remixed this model.