I built this Wire Rope GoPro mount out of a couple of Furniture leg coasters, a Bicycle Brake cable and some electrical brass wire connectors removed from their plastic housing. Test flown this morning and here is the result.
I'm very pleased with the video as I have tried many ways to remove the rolling shutter effect previously and this is by far the most effective. The video is shot on a GoPro Hero 3 Black Edition @1080p 60fps. I have also briefly tested it on my old GoPro Hero 1 @1080p 30fps and got similar results.
I'm flying the wire mount on a Reptile 500 quad Frame from Himodel.com and its on the APM2.5 stock 2.91 quad firmware.