I am trying to get this arf balanced out correctly. i moved the firewall back about an inch 1/4 to fit a saito 80 on it. i'm using an onboard glow ignitor. i have all this equipment up front as far as i can and it still is way tail heavy. This is at the recommended 8 cm on the wingtip/ last rib. Does anyone know what the cg should be at the fuselage? This bit of info would make my balacing life alot easier. Thanks in advance.