Original design used to mount the rumba board to the frame of a Makerfarm I3V. The bottom 4 holes are for a heated bed relay, there are various other holes around the sides to hold some wire wrapping (about 15mm) that I picked up from the hardware store, which all feed into the case. There is also a big hole on the top to mount an 80mm fan. I have been modifying this design and trying to make it fit perfectly, and this is attempt #2 and you can see the first one mounted to it in my profile pic. Will upload the top in a few days along with some pictures once I have it mounted feedback is welcomeprint it, mount it with some M3 socket head screws. No supports needed, but I print with a brim so the corners don't lift.