RE: WillHobby Extra 330 1.4 ARF
Dear Everybody,
I balanced at the wing main spar which is about 5 inches from the leading edge.
Also, always seal your aileron and elevator hinge gaps using clear monokote or equivalent. It’s not that hard to do and it is a good habit.
I’ve had too many instances where the hinge failed and the monokote sealing the hinge line saved the day by preventing the control surface from separating completely.