1、New Designed frames，It can fit for 500ESP 、500PRO、500EVO.
2、The swash plate servos are used STD servos and directly control the swash plate
3、The motor position has changed to the top
4、It can put battery in body.(W:46mm,H:50mm)
5、The new 36T tail transmission counter gear cahnged tail gear ration to 4.03
