Phil, do you have front suspension? If so the set up that Bruce suggested is mandatory. It will also give better steering geometry with a rigid front end as the arcs described by the steering arms and the bellcrank are divergent which has a tendency to induce some toe variation as you increase steering angle, messing up the ackerman effect by overly accentuating it.
As shown in the video there will be toe variation even with the wheels straight ahead as the suspension articulates. With true ackerman geometry the inner wheel should turn at a greater angle so that it can follower a tighter arc than the outer as it is closer to the center of the turn that you are trying to make although this really only helps when navigating the pits unless you get really out of shape on your runs.
Roo
