RE: Nexstar does not want to turn on slight climb
I trained on the Nexstar Select RTF and both my instructor and I found it to be a fine trainer, even with the wing tip gizmos and the brakes. I dinged it up two times, not seriously, and both were my fault. After that, I flew it in a strong cross wind and learned a lot about such flying. It was difficult and, at times, scary, but I managed it and never crashed it once.
That was several years ago and, I've since sold the plane, and as far as I know, it's still around and training student pilots.
No complaints about the Nexstar, for sure.
I've already put my two cents worth in as for his situation and still feel that he should not have cut the ailerons and put flaps on that plane.
CGr.