Hi Everyone! I just wanted to share my bad experience with the DJI legs. I bought a few weeks ago, the addon landing gear for the F450 from DJI (Link here). The looked really cool :-D (at first). Look:
So I wen't to the park very happy to test my new altitude hold algorithm. After a while I have a bad measurement on the ultrasonic sensor, and the system performed a very hard landing. The result: the four arms of the F450 broke on the same place in the same way. I think this is due to a very bad design of the landing gear attachment.