Torque rods came at an early time in r/c, when equipment was heavy, expensive, and transmitters were very limited in their capabilities. Torque rods worked very well then, and still do for many appilcations, however, today's engines, computer radios, specialized servos, leave little reason to use torque rods in most planes today. Dual servos are so much easier for me to set up correctly, I don't use torque rods very much anymore. Not meant to be a slam on torque rods, just sayin.....