3x1 Gridfinity Case

I needed this awesome case to hold 3, 1x1 Gridfinity bins, so I sliced-n-diced bnorick (https://www.printables.com/social/187921-bnorick)'s Fusion360 project, which is, itself, a slice-n-dice of JamesThePrinter (https://www.printables.com/social/154938-jamestheprinter)'s nice Bin model and ZackFreedman's Gridfinity base. Released under the same license as bnorick's model. My Fusion work isn't a clean as bnorick's, so use his file for any further mods.