Rock Steady, Ball Mount Threaded 1/4-20, Strut Base w/Dovetail, Strut Metal Strap Kit.
The Rock Steady Gopro style ball mount is the durable and versatile low profile design that you have been looking for. This quality all metal mount will not move, bend, or fail, unlike plastic mounts. The metal GoPro adapter is compatible with any GoPro style camera.
This unique Gopro adapter allows over 180 degrees of adjustment. The knuckle clamp attaches to any Rock Steady base allowing 360 degrees of adjustment. The knuckle locks your camera into any position with a hex wrench, or by hand with an included T-handle screw. Buy multiple Rock Steady bases to add numerous quick change mounting locations at an affordable price. Compatible with GoPro, Hero 2, Hero 3 & 3+, Hero 4, Hero 5 and Garmin Virb X and Virb XE or any Go Pro style camera. The Rock Steady Universal Strut Base is a quality all metal machined aluminum base. The strut base fits any size aircraft spreader bar, bi-plane strut, or wing strut from a J-3 to a Caravan. The simple clean design straps firmly to your wing strut without using bulky blocks or bolts. The Cushioned Steel Strap Kit is the ultimate safe and secure universal strap. The stainless metal strap is cusioned with a rubber anti-chafe cover protecting your painted surface. The strap and cushion assembly is cut to fit any size strut from a J-3 to a Caravan. The strap is tightened by hand with a thumb screw for a temporary attachment that is very rigid to hold your camera as stable as possible.
When I was installing it, I trimmed the length of the strap three times and it was still too short! - Just kidding. It took me about a half-hour to assemble and install. Its a really solid mount and has a quality feel to it. I havent flown it yet, but I can tell that the camera is going to be rock solid on it.
I bought these for my Auster restoration. I wanted something sturdy and adjustable that can be relocatable on the wing struts. This seems to fit the bill and all I will need is CASA approval to be able to fit them to the airframe.