I would like everbody to know this is my first heli and need some help. Just bought a used t-rex 450 seems in really good shape. I am using a rd 6000 transmiter and reciever. Hooked everything up and seems to work well but tail rotor will not center when I let the rudder stick go, is this normal with a gyro hooked up. If I move heli side to side I can see rotors move really smooth and slow i believe because gyro is working proper. But when I try to use rudder stick it will not center if I drop stick. Any help would be great.