This is a novelty case for Raspberry Pi 5, in the form of a quadruped robot tank. Only the base needs to be printed with supports under the leg attachment points. The rest can be printed as presented in the STL without support. A raft on the cannon and legs is recommended. 

The lid and turret need to be glued together - I made them two separate pieces to avoid difficult support removal. Super gluing two parts is much easier. 

Legs attach to the base using M3 10mm screws. Most every computing enthusiast has a bin full of screws that contains a few of these. Assemble the legs using the two pins that are printed along with the leg parts

The standoffs for the Raspberry Pi are sized for M2 screws to cut into the plastic. 

The space for wiring is limited, the USB-C and HDMI cables need to be right-angle connectors to fit right. I run this Pi headless (no monitor connected) so it isn't an issue for me. There's a slot on the bottom of the base for wires to exit underneath also.