I too, have learned many things in this hobby / sport. Although I haven't been at it all that long. I do try to pay attention to details, and am glad I caught this. I know I am repeating this, but, it wouldn't cost Hobbico anything to do this right. It really was bad, the amount the arm deflected. I guess I should try to spend more time on my build, ( a 4* ) and less on ARF's, but it's difficult when I am away working so much. Whaaaaaa.