I have been looking around and haven't really seen the answers to the long list of questions I have. If it has already been covered somewhere, sorry. Under the update section, it list all of the different things that can be updated, I only know what the GPS and Battery actually are. What is the Main Controller, Zen IMU ext? Obviously I don't need to know any of that to fly it and take videos, but I would like to know. Is there somewhere I can look to learn all about the PT2 program? I just noticed the RC calibration section under basic... I thought you calibrated the transmitter in the RC program? I have been looking around YouTube for a full explanation of everything, but I figured asking a bunch of people who fly everyday would be the smarter option. Finally, what does everyone put under Flight Limits? Default or is everyone imputing around the same limits? I know its a ton of question and they might have all been answered in 100 different topics, but I wasn't having any luck finding all of my answers.