I use two pieces of 1/4 sq. basswood, and join them just behind the servo, add wire and wrap in the usual manner. Lay them out over the top view of the plans, and at an angle that leads them straight towards the control horns on the elevators. Add threaded wire at the rear ends, starting just before they exit the fuselage. Use a good servo, one is enough. With a wood fuselage and wood pushrods, you will not have a change in trim due to changes in temperatures.

Clair