Rack for Raspberry Pi B+ / 2 with Hifiberry Amp+

This is a pattern to make a rack capable of holding 5 Raspberry Pi type B+ or B 2 with a child card Hifiberry Amp + on each. An opening on the side allows access to the terminal blocks for power and audio cables, and a front opening provides access to the Ethernet ports. A compartment on the side can accommodate an ethernet switch.
The second model adds two additional locations because I needed 7 location, but my printer tray was too small.
See picture for more comprehension.

Full multiro