I remember doing project about ABC in early '80s - it struck me as a fantastic concept with plenty of scope for development. It seemed rather a pity that it appeared to have been dropped in favour of the tilt-rotor, which is surely a more unweildy machine?
Times move on & things develop but great to see the X2 flying - how about something of this ilk for Police work? Must be the coolest way to improve response times!!
Pretty good for corporate work too!