The lugs do not need to press into the rotor. The OEMs use a single screw to hold the rotor in place. You can drill and tap your hub to match if you like.
The size hole will depend on the lug used. If the shank poke out the front side of the hub the rotor will need to clear it. A properly sized lug will not have splines protruding above the hub.
We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind. - Stu Harmon
