Hey Dave I would like to see how your grinder contraption works out , I was thinking about doing something similar but was planning on using a big heavy router with a 1/2 inch end mill or burr chucked in it and a frame to run it over the anvil. I have seen woodworkers level big heavy table top slabs this way. Being an anvil is not wood I dont know if vibration will shatter the tooling, so maby your grinder Idea is a more viable experiment . A crazy idea as a result of insomnia. lol