Robo3D Camera mount for Bed (centered)

I originally created the [bed mount](http://www.thingiverse.com/thing:703550) to be held to the frame via screw, but then I realized that wasn't a great idea since it could cause problems with frame and glass. It works very well just with friction, so I've designed this second one to attach at the center and give a better view of the entire bed. [Here](https://youtu.be/tG_4eJfkyY8) is a sample video of a print on YouTube.