I new at this to but what I had to do was, First don't believe that it is ready to fly out of the box. This is not 100% true. I had to adjust the main rotor head so it would not go to the left, after that i had to balance it at the nose because it did not have enough weight to level it. The main problem that i had was that the my main motor burn out and now my reciever is messed up because of it. Andy from exceed RC has been very helpful to me in trying to get it fixed. The main thing is that you remove the sticker from the main motor because it will lead to problems (I guees you know that by now) anyway how did your rotor hit your tail boom?