7" Tablet wall mount

I have an older 7" Android tablet mounted on my wall to serve as a home automation controller. The mounting brackets I'm using are a bit clunky-looking, so I'm going to print a set of these, one for the top, one for the bottom, and one for the right side which also hides the power cable. In addition to the screwholes (for #6-3/4" wood screws), there's a hole on the top/bottom I can position over the one button on the long edge I need to get to occasionally -- I'd have to press it with a stylus