On your wing tips did you "precut" them before glueing them on? I'll take a photo of the motor and post it next time around. As far as future builds I can't recomend enough on building a Sceptor 100 ($105) from Mountain Models. It builds easier than the Sig Risers although the instructions are few and not step by step so one should be able to build off of plans. The would was of good quality and it was my first time building from a laser cut kit. Man I'm spoiled now.