Up for sale are two Align GP780 Head Locking Gyro's. I bought a TREX700 F3C to build a aerial photography platform and was going to use the stock GP780 gyro, along with 2 more for a 3 axis gimbal system. I obviously never finished the gimbal. These gyros are brand new, never used, never mounted, never hooked up. One came with the TREX 700 F3C, and the other I bought additionally for the gimbal.