RE: Where Is Correct Balance Point
And that's only with a perpendicular leading edge to the lateral axis. Tapered or swept wings will give different results as you move away from the center of the aircraft.
The plan or with an ARF the C.O.G given in the manual is just a starting point. Unless you built exactly as the designer did and installed identical components in the same locations your results will vary. Start with the suggested balance point and then fly it to determine if it's balanced well. If you trim it for hands-off level flight and then pull up to 45ยบ at crusing speed and half-roll inverted then release the sticks does it hold the line? If the nose falls it's nose heavy. If it climbs steeper on it's own it's tail heavy. Knife-edge will tell you about tail-heavy also. When in doubt, start out nose heavy.
A very nose heavy airplane flies poorly. A very tail heavy airplane flies once.