A modular case for the raspberry pi, print a top and bottom to suit whatever you want to mount your pi to, and whatever top you want so you can cover/see your pi.
The four sides join to form hinges - this makes it easy to bolt them all into a line of four, fold it around the pi, then fix. I experimented with supporting the pcb from above and below, but this design causes the pcb to flex far far less.
Print the four sides, then print whatever top and bottom you want to fit (i'll upload these soon if i haven't). Use 4 m3 bolts to secure everything (I used cable ties in the photos because I didn't have 4 bolts long enough.