for the ntc3 to turn....
this mod will not cost you anything and will make your ntc3 steer.
don't use the servo saver feature of the ackerman.
there is one screw that holds it down. screw that all the way and dremel whatever is exposed so it won't get caught up.
hope this helps you out. i drove a ntc3 for a year and a half and this is the very first thing i did to it.