i have the crystals that came with the transmitter originally, my first package came with the plane and engine and remote all factory installed, i crashed it and the old receiver is not in working condition, it shattered, i believe that the crystal may be damaged because the receiver shattered. i have two 3 day charged batteries running the receiver and there is no response, i guess my best guess now is that the crystals are damaged, what do you think? could this be it....i need new a new crystal set.