Flyht Pro Case Stacking 3 987x353x372mm

I got one because I have the smaller stacking ones, and wanted to have the bigger one too. Well, I'm quite dissappointed. In terms of compatibility, the small ones will not fit on this one side by side. The difference is like 10mm maximum. So... why? You can only stack the same items on each other, but you can not combine the small ones with this. If this was a good system (or a good design), every stacking box could have been put on top of any other. But it is not happening here. So... Extremely bad design choice. There could also be a part on the middle where the other side of the small boxes fit into (the corner bulges), and the boxes would be more securely fit on top of each other. If not for these flaws, it would be a fine case. But I admit, the non-stacking bigger one (the Universal Foam 800) is a lot better. At least to me. But the corners on that one are not made for stacking, the "corner bulge" slips everywhere. And it is not the same size as the stacking ones either. So... In one word: dissappointed.