try to put the tie rods on the inner holes of the hub mount... That is the only mod I've done to the streering...Also, make sure your end (ball and socket) are mounted on the bottom not the top.... I can turn my truck around in the space of 4 feet easily, can spin around in dirt in less than 2 feet... If you need a larger area than this, something is wrong... I will tell you, the servo will give you greater turning because it forces the wheels to turn more... try some adjustments to the tie rods to make sure both wheels are turning the same amount... If one isn't turning enough, it will increase the radius....