I agree with Hammbone here, I would not shell out the 200 bucks until such times as I tried to glue in some plywood to make it work...or better yet call comp arf and see what they will do for you. The last time I looked the hitec servos were pretty close to the same size as a standard servo, perhaps your elevators have servos opening cut for 1/4 scale large case servos, but your best bet would be to contact comp arf and see what they say first!.