I tried a different approach when trying to get a low quality, Harbor Freight bench drill press to work. I got a little board camera ($40 color, less for B/W) and made a holder for it with a 45 degree angle mirror. I mounted that under the drill press stage and clamped it down, then made some test holes and marked with tape on the TV screen where the hole would be made. Then I just needed to align the board with the bottom pad centered on the marks on the TV set, and usually I can see the top pad as well and try to line up with the small overlap between them.
It was easier for me to do because I have several of the little cameras left over from underwater ROV projects.
Mike