First one for Robert of him practicing with his Blade 450 3D:

http://vimeo.com/70864819

and then my first test of the "rescue mode" of the Skookum Robotics SK-GPS on my 450:

http://vimeo.com/70878441

To explain what is happening in that one, the rescue is initiated by the GPS unit (add-on to the SK-720 flybarless controller) when the heli goes lower than the preset 'hard' floor (10m in this case). I was testing by descending in nose-in inverted orientation and the rescue ends up piro flipping to upright, tail-in, and then climbing to about 5m above the floor where it stops and hovers. 

The minimum altitude you can set for the rescue hard floor is 8m which seems a bit too high for the 450 but would probably be fine for a 500 or bigger.

The SK-GPS contains a GPS for position, a magnetometer for heading and a barometric altimeter. The SK-720 flybarless controller contains gyros and accelerometers and is capable of self-leveling on its own.