NEWBIE ALERT! Who makes a large brushless coaxial rc heli with heading control and

[ELKRIVERSCOTT]

shaft extender? Read enough to steer clear of Walkera. Want big to handle wind and haul 20 grams of video up to 100 feet altitude. No idea what I'm doing, but having a great time! Something with sim plug? Big Lama? Art tech? Thank you in advance. Like to charge four lipo batteries at the same time, understand danger. Does more power battery equal harder to lift trade off? Read that heading better than yaw control. How about anti crash gyro on board? Always a good idea to add cooling fins?