I just purchased Maven and I'm planning to take my first waypoint flight with it tomorrow. As I'm setting waypoints it occurred to me that I have no idea how tall some of the trees are in the area I'll be flying over. I've tried to set my waypoints high enough that I think I'll be above them, but if I guessed wrong will I be able to take over the controls manually once the Maven flight is underway? I would assume that's the case, but I'd hate to sit there and watch my drone crash into a tree and not be able to do anything about it...