I should also say that I only have 4 flights on the airplane. On the first 3 flights I needed about 4 degrees of up trim ( elev trailing edge up) to hold level while upright. At this setting it would dive when inverted. I moved my batteries aft and did one more flight and now have what I state above. I suppose I should do some more flights and feel it out some more as it was much better on the last flight. This is my first large gasser and I am still not real comfortable with it yet. Other than the balance/ele trim issue it flies great.