New Hubs 9" 5 X 4

I got in contact with Scarebird and the answer was the hole on rotor are bigger but there should be no problem!
I don't believe them and there is a problem rotor does not centre and fix proper so my mechanic tells me.
Please get photos and show us when you have done your change.
thank you
i wonder if you guys may be overthinking this?

there is a ring that comes with them, it goes in between the hub and the disc, and allows the disc to center on the hub
once that is done, it really shouldnt matter how big the holes for the studs are