Balancing my new 1200 Sea Fury

[Labcab]

I've marked the 80mm/3 1/8" balance points on my plane. After reading all of the coments I see that the most weight that has been added is 3 to 4 Oz I'm up to 5.5 Oz and the plane balanced level, both inverted and upright. This seems like a lot more weight than all the other plane's balance point. I can't believe that my plane is so much more tail heavy. Before I fly I want to make sure everything is correct. I'm also useing a 4c 4000aMh battery that weighs 14Oz Thanks for your help Gary Brady