Original poster: "Nathan Morris by way of Terry Fritz <twftesla@uswest.net>" <themfam@home.com> All, I have an old heavy glass insulator that I would like to use for a torroid mount. Does anyone on the list have a suggestion on how I might be able to drill a hole in it? I have a drill and a standard set of bits, but I think that the conventional method might just ruin my bits. --Green Horn