DrunkYoda, I lost a weight on my flybar and had to replace it so I removed the linkage off the old one and saved the remaing weights incase this happens again but anyways I put the old linkage on the new flybar and this improved my blade tracking over using just one it also seem to help the stabilty abit. I wouldn't run out and by another flybar just for the linkage. Wait till it needs one, or check ArrowNautic's post above to get the upgrade short bar with 2 linkages already installed. And many other affordable good upgrades.