Im with geistware on this one. But the question is on this size plane why add all that extra tail weight. Use a Y pushrod or a bellcrank and put a Hitec 545 (or 605) in the middle. Or use 1 servo in the rear and join the elevator halves. 2 605's in the tail would put 3.5 oz of weigt on the tail. That may require as much as 10 oz of lead to balance on the nose depending on setups I had a MW lil cap and used a hitec 545 with a Y pushrod so that each half was adjustable. As long as you keep the elevator servo arm centered to the fuse you wont get any off set throw. Personally I dont think 605's center well enough to put on an elevator but thats just my opinion