I really appreciate everybody’s input. Before asking for advice I thought about locking it in our end mill and using a small (1/4”) new 4-flute carbide, level the area. Then using the same machine, find center and drill it out. The thing is hard as diamonds though, so I did not do it. I have a talented welder at work, who when asked can do anything. We both liked Shane’s idea with the washer and nut and after discussing it some cause he has some ideas of his own, it is sitting on his bench waiting until he can devote some serious time to it. I expect to prevail, I just have to wait for Brad to finish a project he’s on at work. I will let you all know how it goes.