MMallory,
I totally agree with you on not using a single HS-85 for any control surface on a .40 size plane but two of them on this elevator should be more than enough to do the job and hold up. It's not a 3-D aircraft and the throw at high speeds is very minimal. Several pilots have posted using two HS-81 servos which have quite a bit less torque than the HS-85,s. With two HS-85BB on the elevator the linkage is extremely tight with no slop whatsoever. This is definitely what I would look for in this plane as any flutter of the elevator will most likely end in a re-kit.