Don't worry about the trim just fly it and enjoy it. I have had mine for about three years and have done every kind of damage imagineable and she just keeps flying, ugly trim and all. For the prop problem you want to run the nuts to the end of the threads closest to the motor and give it a good tightening with a lock nut on the out side. Try not to strike the ground with it on take off. Also get rid of the nicad and go at least to a 7 cell 300 mah NiMh, you will love this plane!