I am buying a Radio for my Mini Piper, and the standard radio, which I don't want, has 2 HS-55 servos, and the better Radio that I want has a different # of servos and a totally different type of servos, and then there is one (about ten bucks more) that has the same type and # of servos! Which one should I get or does the number of servos and their type really matter?