My Printrbot simple metal kept moving around my desk thanks to all of the vibrations and movement so I decided to lock it down with these little L brackets. Fundamental design using double sided mounting tape to prevent movement. Works like a charm!

In Repetier, load the file and make 5 more copies to print all at once. Use double sided tape on the desk side of the bracket (not on the printer side) and fix the printer into position. It wouldn't budge horizontally but you can lift the printer right out if you need to.