Feet for PrintrBot Simple Metal

(EDIT: I have a new version of these! http://www.thingiverse.com/thing:460365)
Basically, I got tired of my printer slowly inching its way off my glass table, so this was my solution! I designed four feet specifically for the PrintrBot Simple Metal, with a flat bottom so you can attach adhesive rubber or foam pads. Currently the back feet fit snap into place over the existing screws, but the front feet rest in place since there is nothing but flat metal in that area.
Don't forget to take a