I realize that you already bougt servos. But here is a suggestion anyway. I have some Hitec HS-475HB's that I am going to try. They have 60 some inches of torque. The new carbonite gear sets. But unfortunately only 1 BB. But the price is right I payed 24 bucks at my local hobbie shop. I have seen them listed at 19 mail order. Got some heavy duty Dubro servo arms and ball links. With Robart control horns and clevises. Should make a real tight set-up. good luck with your somethin extra.

Mark Shuman