Ineed help with the cg on this bird. On the nose is a 91 os four stroke and all gear installed and ready to fly, she balances tail heavy. I had to install 4 1/2 oz on the nose to get the reguired 5 1/8" to balnce the plane. I fueld the supplied tank (15 oz?) and the plane was extremely nose heavy and slow to lift.SoI removed thelead from the nose and checked the cg with fuel and againis was extremely nose heavy. Isthere a correction on the cg required distance from the leading edge??