After I can hover the KALT30, I still crashed the T-Rex twice when I tried to hover it. Till then, I realized that smaller helicopter is not easier to control.
Several days ago, one of my junior in our lab want to test his spy camera with the helicopter. We mounted this camera on the T-Rex and decided to test it indoors. I think it is my first time to hover T-Rex in such a small room. It is really tense! Fortunately, I hovered it without any accidents.
Here is the video: http://www.youtube.com/watch?v=CRnSMfQSPx4