Arduino Nano 6 pack

I built this box to hold 6 Arduino Nano's. You can get them for 3 or 4 dolars each from Amazon if you by them 10 at a time. I'm using mine to power a LED sign. Each Arduino Nano handles 6 strings of 50 WS2812's (300 in one sting). My LED sign is 50 by 36 LEDs. I have a USB Hub with 7 ports. I control it with a Winbook tablet running Windows 10 and Jinx!

I soldered the wires directly to the Arduino Nano's (I did not solder the pins onthe Arduino).

As you can see from the pictures Th