H47T029XX Align Trex 470LT Torque Drive Upgrade Set.H47T029XX Align Trex 470LT Torque Drive Upgrade Set. For remote control helicopter use. Instruction: Specification: Use for T REX 470L. Highly reduce gear abrasion and increase power output gives more direct and precise flight performance and extraordinary tail performance. The new high intense Torque Tube allow to reduce gear abrasion and extend the gear lifetime value in extreme flight dynamics. Screw and fix the fixture on and modify the mainframe