hi
i had the same trouble but it got better ones i change out the blades for new ones and i used this tool http://www3.towerhobbies.com/cgi-bin...?&I=LXPU13&P=M now i gotting so good i do it ith out the tool and just do go as deep on the ailerons ,ca hinges are good for 40 size and below i go with the robarts on 60 size and up just make sure that the hinges are well oiled before you glue them in and make sure that the hinge is in line to go up and down
http://www.youtube.com/watch?v=VnBCelaWyP8