For months we have that chopper, an aesthetic marvel, control, strength! FINISH choppers that break the figure, offend ceilings, walls and furniture and fall by breaking! This one driver to the nearest cm, performs all the figures and all required travel, thanks to its (her) gyroscope (s). AWESOME: stability, lateral displacement also, setbacks, flights tidal land, displacements, rotations and stops there. A few tens of minutes and you will have a perfect mastery. BRAVO designers!