I have pacific aeromodels edge 540t and laser 200, and in both setups they are calling for dual elevator servos, servo openings are staggered, one horn up, one horn down - from factory! (to avoid reverser) this will not be perfect at full deflection (the arcs have to be the same). My solution - dual elevator bellcrank (world models), made plates to cover openings and mount bearing flange, carbon fiber pushrod, 90 oz digital in regular servo bay. Should be dead nut as long as holes in elevator halves are accurate. We'll see.......
I'll post some picts later

Ted