Homemade Hot Key Pad for Tablet Monitor

I made this to add some simple hot keys while using my Monoprice 19" Tablet monitor. It can be mounted on the side if you remove the screws from the monitor corner and use some slightly longer ones. It can also just sit on the top of the monitor if you want to rely on gravity. I used an Arduino Trinket to serve as the interface between the number pad and the computer, I think I am going to replace it with an Arduino Micro though since the Trinket can only handle three inputs.
The blender file