I completed one of these last year with a 160FX and it is an excelllent power to weight combination, I did not have to add any weight at all and mounted the battery behind the lower wing trailing edge in the fuselage, I fly it with a Biela 18x8 and it has unlimited vertical, it will probably 3D but I did not build it for this reason, it weighed out right at 12lbs, not bad. With the extra power from the OS I will probably add smoke at a later time, it's a show stopper.