This is for used main gear off a trex 600xn. Gear itself is in good condition one way could do with replacing.
TAROT 450 Metal Tail Boom Torque Tube Bearing Linkage for Align Trex 450 DFC PRO
Align Trex 600N DFC Aluminium gyro mounting plate
Align Trex 600N DFC Aluminium Engine fan and Hub
Align Trex 600N DFC Aluminium Elevator Arm
Align Trex 500 DFC Main Rotor Head
STASRC 450 Torque Tube Main Frame Set for Trex Align 450 PRO DFC Helicopter