GAUI Gear Shaft (15T) - GAUI X4II / NX4

• USE for: GAUI X4II / NX4
• GAUI NX4 - optional
• GAUI X4 II - Stock replacement
• NOTE for NX4 pilots: When used on the NX4, this optional 15T gear is used to lower tail RPM on the NX4 by 7%, this may be required when running Higher headspeeds (2800~3000), or larger tail blades. Lower tail RPM can also allow for higher overall tail gyro gain in some set-ups. (stock gear is 14T)