I've had standard servos on a plane this size and it was overkill, (long time ago, was a flybaby designed for .074 power). 4 channel and I used 4 standard servos because back then micros were way too expensive. It barely flew with the .074 so I ended up putting a enya .15 on and it flew ok. In hindsight micros were the way to go. An few ounces makes a substantial difference on planes like this.