I bought one of these MRo Clones from China. The specs that went along with it say it is an updated version with a 2meg ram. My question is, when I load the firmware, MP asks which pixhawk I have Type 1,2, 2.1, 3 or 4. Which one should I use? I know it’s not 2 or 2.1 but their are other choices and the right choice would help tremendously.