interesting, I've had no issues with my dex210 other then the single outdrive wearing big time, but that was from the original first bad batch and got free parts. I've also broken 2 dex410 front driveshafts, but both times were with a fist full of throttle, once on landing on one wheel, and the other on a pipe at full lock ( different side, so possibly a batch issue) It sounds odd you're having such issues
