i run a shop that sells all size servos from hitec an the only one that is worth a damm is th hs 81 its for park flyers jr is by far more precise,stronger,an cleaner geartrain no flatspots an in my opinion if any of u guys used the servos u would know what i mean u try to use the on an 3d bird an the minute you turn your travel to 150%they lock an stay so u go buy the programmer SUCKERS!SUBTRACT THE PROGRAMMER AN BUY JR YOU WILL NEVER LOOK BACK AS I SAID HITEC IS GARBAGE