I'm installing 605's/645 in my H9 Edge. After reading this, and pondering though, I've already modified the plane for dual elevator servos, and have been thinking that 2 605's are overkill on elevators. I just might step down to 425's, or 545's.

I'm using these same servos in a Midwest Extra with no prob. I've been wringing it out pretty good too. The experience I've had with them in an Extra is what I based my decision on for my Edge.