If Rage uses no chain or air pistons or cable or rope to extent their arm, how does it extent 12.5ft in less than 4 seconds??? 
And how can the whole arm assebly only weigh 20 lbs??
Maybe we can find out by watching the videos?
http://www.rage173.org/video.php?catid=28
Hint-there is one fisherprice motor on the arm :rolleyes: