Tracking is not darting. Darting is a setup problem. I have no problem with either. Not saying my sled won't follow tracks, but in neither situation are duallies the cure.Dual runner bars remove most of the darting in snow/trails that have set-up hard with ruts from previous sleds skis. Spring riding makes this very obvious, and no amount of adjustments is going to remove this trait, short of installing skis with multiple keels.