I am looking into upgrading my steering servo's as the stock 2075's just don't work well with my Big Joes. I know it's best to get one powerful servo but I am I'm looking into getting two metal gear Hitec HS-5646WP servo's. However they only give a 31oz torque increase over the stock 125oz. Has anyone done this upgrade? If so do you see any significant improvement? Any other options?