Arduino Due and Mega + shield enclosure

Summary An slide-in enclosure for Arduino Due or Mega with room for a shield. You will need 4 small screws for the lid and at least another 4 for attaching the Arduino. Note: The lid object triggers a strange bug in Slic3r (V1.2.9) which produces gcode that massively over-extrudes the infill, at least on the first layer, which means the print will not work. I used Cura to slice this item which then prints ok.