It's cool having a two part case prototyped, but I think you might better to switch to a six part prototype of your prototype case before real frustration builds to the point of taking psychotic retributions upon school property. Been there, done that, but rarely upon the property of others. [}] ]'>

Maybe try doing dovetail joinery for the carcass sides held together with snap-on lid and bottom. :?:

@BMOW: some creative wood joinery would allow you to print a pair of ship-lapped parts that slide together, clicking into place with a latct for easy case removal. The overlapped sections bring the case down to dimensions that you can print.