Assuming you are using a flat or symmetrical airfoil on the tail (no mean line camber) then the aerodynamic center of the tail will be near 25% of the MAC, the pitching moment will be zero and, with the pivot there, the forces on the servo and linkages will be near zero. The flutter speed should be beyond the maximum airspeed of the model. Keep the linkages stiff and slop free even though the forces are near zero.