Apologies if this has been covered. I've read that when DJI releases a new firmware within a few weeks you are forced to update. Is that correct? I remember when the firmware came out there were tons of complains - but now they appear to have subsided, how is that possible? Also, I plan on flying 600km/400 miles away from my standard location, and plan on doing an IMU and compass calibration. Any tips for finding a perfectly level surface where there is no concrete/metal around? It's harder than I thought it would be! Also has anybody had any issues at flying at cold temperature (-5c / 22 farenheight)? Only concern really is the battery but i'm confident it should be fine.