Boring Z71 wheels

Anybody in here that has bored a set of z71's with a router? Im wanting to do mine for my hardbody but unlike the eskies or titans, the Z's dont seem to have a lip on the outter face of the wheel to guide the router bit leaving a smooth machined finish.
What are all of you that have done this doing to get a clean edge?

I'd take it to a machine shop and give them the measurement of your hub diameter, and tell them you need the bore made the same size.

Go buy two hole saws, one for the diameter of the current center diameter, and one for the size of your hub. Use the smaller one to center the drill and bore the hole to the size you need. Or just drop it off at any machine shop, it's a simple task for them.