this is how I modify it to install servo on RHS...
only grind this part flat on both side...
because the steering arm is grind-ed add 7mm shim here and 1mm between the arm and the steering rod...
another side just install the arm like how the manual told u...
whole view, make sure it is smooth and not too loose...
the chassis is no need to grind like mine, it won't affect the movement...