This tray allows the use of two layers of bins in Matthew's Modern Gridfinity Case. The tray itself adds 1u, the handles add another 2u. This means that in the 6u case, you can use one layer of 2u bins and a second layer of 3u bins. Either one can be on top. There's a tray version with one centre handle, but I would advise against using that. Be generous with the perimeters when printing either one.
I've also designed some spill protectors. Andreas already had the same idea, but his model didn't fit my bins and I also wanted to do a few things differently: Mine snap firmly into place, don't cover any part of the label and are available for several bin subdivisions. They are, however, more delicate and less flexible to use. Print them upside down with supports.
I'm also including the bins I've made with the Fusion Gridfinity generator. Label is set to 11mm, otherwise they should be pretty standard. I'm just providing them for completeness, because they definitely work with my spill protectors.
The author remixed this model.
Technically I didn't modify anything, everything's made from scratch. But my spill protectors are inspired by Andreas's add-on and fit Matthew's case.