it´s a os 91 surpas

and for the cg i play with the bateries,

On mine i put the bateries at most rear i can (with the servo on the kit position), and in the last fly a put a nut with scotch under the tail. (CG+- 42%) with the fuel tank front. I want to move my fuel tank for the center with a perry pump.

I "try" to fly 3D

Sergio