This is a simple enclosure for a Azteeg X5 mini smoothieboard stepper controller board from panucatt. I designed this for my Makergear M2 printer to replace a broken RAMBO board (USB communication sometimes broke down when the printer was starting to print). The board is mounted with the bottom of the PCB looking upwards, this way the 50mm X 10mm 12V fan can cool the stepper drivers much better (the heatsink coming with the Azteeg X5 mini board is mounted on the bottom of the PCB).