To use a GWS EPS-5AC/G with this motor you will have to shave off 1/2mm off the screw tabs on the EPS-5AC/G to get the Feigao to fit properly in the gear frame. This is very easy to do. The following image shows how this is done:
Feigao in EPS-5AC/G
WARNING: As with all electric motors if you over-prop and over-voltage you will exceed the current limitation of the motor. This will result in permanent damage to your electric motor. BP Hobbies assumes no responsibility for this kind of damage.