I just bought a used LASER 3D, flew it last night and while flying the elevator started to flutter violently. The tail feathers stayed on, so I landed it. Upon inspection of it, it cracked along the entire bottom side of the fuse and a little bit on top in front of the rudder. The plane is equipped with flying wires top and bottom, has swivel ball links on both ends of the control rods which are connected to Hitec HS605bb servos. Does anybody have some suggestions on what else I could look for or do to prevent future flutter.

Thanks

Terrell