Since the new USAC rules prohibit a visible computer display, I've been spending some time thinking about how to hide a garmin so I can still record my race data. I had the idea recently to try mating a k-edge garmin handlebar mount to a k-edge gopro saddle mount. While it wasn't exactly plug and play, it went together easily enough. The slot on the garmin mount needed just a small amount of filing to fit the screw spacing for the gopro mount. If you don't feel the need to also use a gopro, you can just use the handlebar clamp screws to attach the garmin mount to the saddle rail piece of the gopro mount. Otherwise, M4x16mm screws work perfectly to fasten all three pieces. Here's some photos:
The Mount:
With an Edge 500:
With an Edge 510:
With an Edge 810/800:
