As some of you may know from a previous thread, I recently had to upgrade my Advanced from v1.4 to v1.6 in order to link it with a new RC I received under warrantee to replace a defective one. Well during the first test flight yesterday, I noticed the Phantom was vibrating quite strongly. Did an IMU calibration and it seems to have resolved the vibration issue (or at least improved it... hard to say). Anyway, I was concerned the vibrations may have done some damage and sure enough I discovered a small hairline crack under the one of the front motors... sigh... I'm gonna contact DJI support about this in the next few days (and send them photos). Honestly I'd like to just get it exchanged for a new one with the re-enforced shell and the new motors (mine has the old motors and shell). If I ask do you think they'll agree to just exchanging it? Anybody done it before? Also, if it comes to it and I have to send it in for repair to get the shell replaced; does anyone know if DJI is replacing the older shells with the new re-enforced ones? Thanks, and sorry about creating another thread on this topic!