Glen
A DS8411 is overkill for an aileron servo in a pattern plane if you need the power of a DS8411 to drive a aileron there is something wrong in my electric powered model I am using DS3401's for aileron a DS8411 for rudder and a single DS9411 for elevator I use 1
2S flightpower 800 mah battery through a powerbox digital regulator/switch which supplies 5.5 volts to the receiver the ailerons on my model are larger than the Beryll and the DS3401's have no problems moving them I use about 35 mah out of the receiver battery to do a P09 flight with electric powered models you need to save weight where you can or you will go overweight

John