Gary, you must have a very smooth running Carbon Cub. I cannot get any quality video with a single point mount on the GoPro 3 in my CC.
Several of us are trying to find a mount that can be used with the GoPro 3. This GoPro has the Sony IMX117 chip which can produce video quality far better than any HD cable or satellite source you may see on your TV. As a matter of fact it can produce stunning 4K video at low frame rates. So this little camera can produce video quality that can rival professional video equipment costing more the 10X what a GoPro3 costs.
In order to get that video quality you need a camera mount that produces no vibration in the camera. Not easy in a Carbon Cub. My most recent mount offers two more important features in addition to vibration dampening. When shooting 1080, 60fps, using ProTune, the GoPro 3 will exhaust the battery in under 30 minutes, so my latest mount has room to mount an extra battery for the GoPro 3. Also with a wing mount near the wing tip, the camera can now shoot a 170 degree field of view video without any part of the airframe in view (including the prop).
So this whole effort is aimed at producing professional quality HD video from the Carbon Cub. Up to now the only camera that could produce these results aloft is the CineFlex V14D which only costs $500,000 flying under a $5,000,000 helicopter. Results so far are getting close to this standard.