I used a z590 for the steering once and it worked better then I thought it would, it has 85in/oz but now I use that as my throttle and the Airtonices 94359 for steering its got 200 in/oz of torque. but most people use a servo with 333+ in/oz like the JR9000T, Hobbico CS-170, JR 9100T, Hitech 5955, and theres another Hitech thats got 333 in/oz but can't remeber the name.