This is a case for the Open Bench Logic Sniffer inspired by some generic extruded aluminium cases, but 3D-printed.

The PCB slides inside the shell, then the cap covers the side where the USB receptacle is and is mounted with two M2x4-10mm countersunk screws.

There is an optional LED diffuser which can be printed using transparent filament. It fits snugly, but I recommend a drop of CA glue near each hole. Mounting inside the shell requires a bit of patience, a toothpick or a similar tool can help insert it when positioned. Better try a few times before applying glue.

Print the shell vertically, inputs-side-down, with support (touching buildplate); the cap face down; the diffuser as provided. Print all parts with PLA, 0.4mm line, 0.2mm layer height.

OnShape link: https://bit.ly/3wKaUhN

Version 2 of the cap is slightly thicker and has larger countersink.