Printrbot base and switch holder

This is a base that you can use on the printrbot simple metal to give it a bit more of a footprint for stability.

It also allows for the mounting of a 16mm(drill size) push button switch that you can wire up to the power supply to switch it on and off from the front of the printer instead of reaching around to the back. I used one of these light-up LED switches so I know if I forget to turn it off after a print: http://www.amazon.com/gp/product/B00Y3KCZ4W

Any mini-ITX power supply will work. These are usually server PSUs. Just get the appropriate wattage.