RE: Usin two digital mini servos for Focus 2 elevators
I'm currently running 9411 servos in the elevators. These weigh 1.36 oz. I am considering switching to JR 3421SA's as between the two I'll save about 2.3 oz in the tail, which should move the CG forward some. I'm at 8 1/4 inches now, which is not bad, just not as nose heavy as I like my planes.
The biggest advantage is no more elevator trim changes between flying sessions. The other advantage is it makes I have not found any disadvantages to twin elevator servos. The plane seems to track fine, as far as I can tell.