Bullitt Wheels - How to open up bore?

@Ian McCrimmon - I like your idea a lot. In my instance the cost of a router and bit makes my simpler, though less precise method, more cost effective. But if OP already has a router.........best of both worlds.

There have been other threads about hub centric vs. lug centric wheels on this site. After reviewing them I did not see an answer regarding best clearance between wheel ID and rotor/axle pilot. Can they be exact? Is .010 enough? to much?