TV mountable Board

Usual you only have a printsize which does not allow you to build a whole board.
The fact that i have a son, seven months old start crawling around make'd it necessary to move my electrical devices to somewhere else. But i didn't want to open the wall to hide the cables, so how can i move these devices on top of the Television. The problem was born and the first step of the solution looks like this board.

## Measurements
Well, just be clear, it should be pretty difficult to just find the e