I myself saw quite a lot of broken, stripped gear's Hitek Digital servos for steering........I know there are ppl said they are GOOD servo......but I believed what I saw.
If you can actually get a better one for a little more....try the Futaba Digital S9451....it is .10 Sec/60 Degrees @ 6V and 121 oz/in @ 6V.......both data are a lot better then your Hitek...it cost $80 at Tower. Ppl in this thread told me to get this model, of course, if money is no object, you can always get those $100 servso..........also, some PRO racer here are using JR model, I bet they are among the best for 200mm steering.