I didn't find the camera mount on the QAV-X to be very functional on it's own. I designed this mount to strap down a Yi using the lens protector strap made by brannnt.
This can be printed in PLA or ABS or in TPU to add a bit of vibration dampening. Use a few zip ties to hold it in place. You can easily slide a strap under the mount and out the back whenever you want to bust out your Yi.
Check out PB3D for a GoPro session mount based on this design.
For more quadcopter and FPV content, check out my blog at http://fpvobsession.com/!