Prusa I3 MK2 PSU cover update

This is updated OpenSCAD file of the original Prusa I3 MK2 power socket location. I didn't like side location, so I put it to the back (height slightly adjusted). Power cables inside were detachable and long enough so relocation was not issue at all.
Original files: (https://github.com/prusa3d/Orignal-Prusa-i3/tree/MK2)

Update 2017/04/29:
There are might be some minor flaws in my design from printer to printer therefore you may check some improvements made by fiveangle http://www.thingivers