Mounting the Sony Mini 600TVL camera on a ZMR250 is a challenge. The original mounting holes on the sides of the camera will strip out if the camera is hit ever so lightly. Likely on the first test flight. The next mounting alternative is to use threaded plastic rings around the lens and mount the camera through a holder. There are a few that can be found here: http://www.thingiverse.com/thing:725352 My front plastic ring stripped out after only a few flights, so I cancelled that idea. Instead I constructed a mount that is held in place by the front posts. The camera is then strapped in place by a thin zip tie. The mount can be mounted on either the top or bottom frame plate. An added advantage is that it becomes possible to remove the camera by just cutting the zip tie and loosening the two front posts, which is a lot easier than pulling the frame apart, which is needed for the other mounting options.