RE: NexStar Trainer
What Bruce said. I am an instructor and so far I have seen too many of them hit the ground, not just the one with that AFS thing on it but the stock ARF too.
This is what I have found so far, you can have that plane set up with perfect CG and control throws but the way the stab bolts/screws on the incidence can be so far off from plane to plane that sometimes there isn't anywhere near enough trim in A radio to get the elevator working correctly, most of these planes I have seen crash are on there maiden flight with instructors doing the maiden or an instructor getting it to fly hands off and turning A new soloed student loose with one.
It's just not A very good trainer unless you find A good one that goes together correctly.
For under 70 bucks you can get A Tower Trainer and just buy some better equipment for it that will advance with you as time goes on. The other trainers may not look as good but they sure fly better.