i bought the Rc show steering bar and it works great and did take up all the slop that the stock one has. i could not pull the trigger on the piston tho. $20 with shipping didn't make sense to me. so i drilled out the ones that the kit comes with 2x1.6 all around.
i found a set of shims from ae that works to remove slop from the ackerman and the spindles for around $2. i can post a part number tomorrow