Oscar, is correct about the tracking. I always check the tracking AFTER the blade has been installed onto the prop shaft of the engine. True, a prop with an out of alignment hole will not track properly, but the tracking will be most affected by the faces of the prop hub. I always balance the my props first, then mount on an engine (can be in a plane or on a test stand) to check the tracking. The force of the prop nut will alighn the blades in relationship to the hub faces and override the fit of the prop hole. Even with a tight fitting prop hole the prop nut and washers will force the blades to be pushed into alighnment with the hub. Try tracking your prop on a prop balancer, and when you are satisfied it is tracking true, put it on an engine and check again. You will be suprised to find that many times the tracking changes.

Tom