The EK2-0704B is a good gyro and will work well in
the proper application. However, the gyro is not compatible with the stock E-Sky transmitters EK2-0406A
or EK2-0406G. The gyro switch signal does not allow the gyro to go
all of the way into rate mode and will result in just minor movement.
The gyro will work with other brands of transmitters as well as the new
E-Sky transmitters EK2-0406F or EK2-0406J.
Secondly, it is normal for the light to blink when
an input is applied to the tail. If the trim is adjusted after
powering up, you will need to disconnect and reconnect the battery to
regain gyro control.