Well took it out today, and was flying a very mild circuit, when i started to lose power. I landed fairly soft though, no damage. However when i took off again, the vibrations were back and worse than every before![:@] Upon closer inspection i noticed the motor itself was vibrating. So i grabbed the outside of the motor and pulled softly to see if there was play. To my surprise i found that the entire top piece can slide up and down! It feels spring loaded, is this a problem? The top piece can be pulled up to reveal the windings but its spring loaded.