RE: Texas R/C Planes Drastick .60 Size
Give the elevators full up on high rates and hold it there, then see how much finger pressure it takes to manually push the elevators back down.
You will be less likely to get flex if you do whatever bend is necessary right next to the exit from the fuselage, (give the controls full down before you bend the pushrod) then have a straight shot from there to the control horns.
Good luck,
Jim