I took inspiration from raster's original design, but added traps to lock the camera in place. Also added some lens protection, in case the thing falls over.
Also, check out my lens cap for this camera: http://www.thingiverse.com/thing:39880
Insert the frame and the stay into the mount.
Make sure the stay is pressed up against the bottom of the camera, to secure it in place.
might also be a good idea to line the inside of the frame with electrical tape, for scuff protection and additional "staying power"