That new mount looks promising. I managed to cobble together something for the TomTom, but it's not optimal.




Between the TomTom's quick-release interface, and the inherent slop in the GoPro buckle interface, there's a lot of play in the system. Throw a rigid MTB in the mix and you get lots of vibration. See:

https://vimeo.com/132563665
I wish more companies would follow Sony's lead and use a threaded/tripod-style interface.