I want to use APM 2.0 for my quadcopter but i want to get it from hobbyking , as i don't have enough budget to get the original one from 3drobotics but it read in a post that the official 3D Robotics APM 2.0 board has a unique signature and the Mission planner will look for that. Other people can make their own APM 2.0 boards, but the official MP will probably not support them, is that so, if i get one from any other company besides 3drobotics i won't be able to download firmware or use MP?