Just got around to describing my 120kph Capable HK Sky Eye FPV build with Pixhawk/Ardupilot 3.5 I built for my overflies of Burning Man 2016:
http://marc.merlins.org/perso/rc/post_2016-08-05_120kph-Capable-HK-Sky-Eye-FPV-build-with-Pixhawk-Ardupilot-3_5.html
After the few upgrades I did, it’s actually a very good FPV long range platform that’s still able to glide and hopefully ride thermals on a good day
Blog link above build details, and more random pictures below v