I checked it on the balancer. But, Now that I think about it, thats not a good way of checking it. The balancer holds the prop by way of the shaft hole, but the tracking will be determined by the allighnment after the prop is installed on the prop shaft with the hub tight between the washers. So, I believe the tracking will be more dependant on the truness of the hub faces, particularly the rear face. I am going to check it after installing it on the engine, after all, that is where it will live it's life.