I would like to install a unit on the Phantom 2 that records different parameters so in case of a crash or something similar i can look at the data and hopefully see what went wrong. Also i would like it to be able to record the flights and show them on a map together with the P2 speed and altitude and so on. I don't mind if the unit has a small size and weight. And it would be a nice bonus if its pretty cheap. Any ideas of units that does what i have described above would be much appreciated. Thanks.