The flybar on our models controls the cyclic pitch, it's there so you have lots of control over the machine...it also acts like a gyro for the main rotor. If you take the flybar off you'll have very, very little or no control over the cyclic. Try messing with flybar weights.....it might answer some of your questions [heavier flybar paddles make the model more stable, while lighter ones make it wild (assuming they are the same size)......small ones make the model more stable while big ones make it more sensitive (assuming they are the same weight)]

Colin