This servo replaces the old analog servo of Esky.
When you replace one of the analog Esky servos from a CCPM helicopter (Honey Bee CP, King and Belt CP), most probable you will have to replace all cyclic servos (the servos connected to the swashplate), because of difference in speed.
According to the manufacturer, digital servos cannot be mixed with analog version at all, but this doesn't seem to be a problem as we received no complaints. Probably they mean mixing of the cyclic servos is not possible.