REMEMBER, I'm just a beginner!!! So by tracking??? I'm assuming you mean the second thing you do after you balance.

1. YOU balance the blades by putting them each on one side and the other of the balanceing thing.
2. Then you take the one that you had to put tape on (the light side), and you lay it across the balancer. FIND the center, and then lay it next to the other blade (heavy one) and make a mark. Take the Heavy Blade and balance it by laying it across the balancer.
3. Then you go back and balance the 2 using the first method, but this time, you put the tape on the spot where you put the mark.

IS THAT TRACKING???

And IF you mean the FEATHER BAR (that's what Nexus calls it) YES I replaced that too!!

Kirk