Looks like I need around 3 OZS of dead weight too make this plane balance.I can't understand why mine seems so tail heavy when I used Cf pushrods and nylon pull pull on the rear of my plane.That should be around half the weight of the 440 wire. I also have the battery under the fuel tank and you guys have yours in the wing.Is the weight of the Saito 72 the same as the 46 before the muffler?What do you guys think about weighted spinners?Do they affect motor performance?Help!!!!Please!!!!!!Thanks