I put together a Reflection Biplane FlatOut, and I have everyting centered up, but the thing rolls imediatly on takeoff. I have the rimfire motor on it, and it did it both with a 2 cell LiPo and a 11x3.8 prop and a 3 cell LiPo with a 8x3.8 prop, same speed.

Do I have a problem if I sanded too much on the nose to mount the motor, or if I don't have the conecting rod for the Ailiorons just perfect?

Looking for any clue as to what would cause this. Thanks