3D, if you have a lipo charger, install a micro deans and charge from your big charger. You'll gain 40% more power and 25% more flight time. Another option is to change the length of the stir stick. By changing the length of the strut you will change the flight characteristics. One thing I have thought about doing, but have not done, is to set up wing struts with springs in the center. That would allow the wing that wants to fly to stretch, and the wing to be pinned in a turn. This is just a theory. Tim