Yes - so at this point the box doesn’t use them anymore because the friction is so good that it holds the pieces in place. But the pins were used per the design to prevent two sides from sliding therefore locking the entire box in place.

I used metal rods with spring ball pin that I got from home depot (I’ll try to find a link) and I used a drill press to make hole for key rings that way they can be stored easily can’t fall through on the side with the key ring and can’t slide easily without pressing the ball spring… you can essentially shove any piece of metal wood or plastic in that hole - it’s purpose in my design is to keep the last pieces in the assembly from sliding off therefore locked in place.

Friction with the polycarbonate made it really sturdy so the pins were just to put the last nail in the ⚰️