I have a single c.f. rod that is supported by a bearing at the rear former and the former behind the wing. Seems to be working just fine. Although 2 servos at the tail would be better if it werent for the darn things being so tail heavy to begin with. Mine balance with no additional weight. Battery behind firewall, throttle servo behind firewall and fuel tank in C.G. S.T. 2300 wbisson muffler. Could use a little more power... I just upped the nitro from 15% to 20% and that seems to give me enough for now. NEVER can be enough...huh.