You have the wrong colour serve saver on your servo....as you said in your post you need the red kimborough servo saver for hi-tec servos
Could also be the servo it self....some hi-etc servos are known not to centre to well :-/
I would also check the steering hubs are not binding and check the steering cups are not tight on the ball studs on both the steering arms and servo save......if you can change them to schumacher ball grippas (ball studs and cups)
