Are you referring to the Great Planes Electrify L39?

If so, it's not an issue for the stock power setup. it takes very little elevator authority to fly the plane.

For higher power conversions, flutter is an issue. If you're running 2.4, you don't need the antenna tube and you can utilize it as another conduit for a redundant elevator push rod. Add another control horn to the other elevator half and that stiffens up both. Either make a Y push rod, or add another servo (that's what I did).

Joe