Lots of modelers consider CGs as being very, very critical deals. They're not.

I just ran the numbers the other day on my 60size Sukhoi's CG locations. The classical equations suggest that my model should fly perfectly safely with the CG from around 3.25" back to 4.5". And that's just the range that will give good performance without starting to degrade it. I know of the same ARF with a gasoline engine in it that probably has the CG up around 2.5". I'm guessing about that simply because it's such a slug. And he's got more elevator throw than mine by a mile. He needs it. Mine will snap in a blur and I don't need nor want the deflection he needs just to fly level.