Hmmm, not sure where your battery and electronics are but mine was setup per the instructions and balanced perfectly without any weight. Same engine setup, standard electronics and fuel tank. Make sure you mounted the engine with the correct distance from firewall to prop hub, maybe engine is further aft than mine was. Don't have the plane anymore but it was setup per instructions and flew well as such (but the .46FX was by no means a power monster for this plane).

- Joe