A local mechanic/shop teacher told me that because the hub and new rotor are two pieces bound together I will have to get the new rotors cut to make sure that they are aligned (in plane) with the hub. Otherwise they could be too much runout and I'll get vibrating. What do you think about this.
If you are concerned, mount and adjust them and use a dial indicator to check for run-out. There isn't much meat to cut on these babies so hopefully they will be true. You never can tell with China castings.