This is a box to host Megatronics v3 board (mine is rev. E). The box is designed to be mounted on the back of a 6mm aluminium frame using existing holes. Printed at 0.35 layer height, 1mm perimeter, with 0.5 nozzle Cover clips for fan cable needs you cut support to route cable in Depending on the tolerance of your printer, please check holes/screw mounts before mounting everything! Since it is a box for an electrical component, use it at your own risk. Design is provided with no guarantee.