Thanks so much for the replies. I think I got lucky; I didn't have access to a longer center drill and didn't want to wait days or longer to get one. I was able to get an abrasive sphere into the slot after some work with a small file. That helped me figure out where the center of the hole/screw needed to be. And then I SLOWLY drilled it out using progressively larger drills. So I have it set up for a #4-40 (#48 drill). I think the original one may have been a bit larger (obviously metric) and I may end up using a #5. Thanks again for the help. Gil
