Video 1: Using vectoring plates to stabilize the hovering.. am I right?
http://www.youtube.com/watch?v=bCJ70Fr1umA
Video 2 : Using props on the wing/boom tips to stabilize it..
http://www.youtube.com/watch?v=NQxuf...eature=related
Is first method (video 1) involved less parts or my eye has missed some embedded wing/boom props to stabilise?