This is a simple case that can be printed without support. Some provisions have been made to keep access clear to: * GPIO headers * sata disk sockets * memory card * two holes can be used to connect the WIFI antennas if you have the module * all main sockets (power, micro-USB, USB2, USB3, ethernet ports) This is a very crude design, it need more work. The openings seem to tight to me. I have put both the STL files and the fcstd files which are the source files from FreeCAD. So anyone can use FreeCAD to modify the design (probably enlarging the openings, or closing the ones they don't need).