Aerobird, unresponsive
I had the same problem with my Aerobird out of the box. I quickly moved the control lines from the center hole on the tail to the bottom one. This helped quite a bit. Since then I have replaced the tail with the larger x-pack one (also with the lines attached to the lowest hole on the tail) and that helped even more. I don't know why they even ship these planes with the lines connected to the center hole, that way you get almost no control at all.