Bob Davis said:

Does anyone own or use one of these optical center punches? At $29.95, its
well worth it if it does the job. Otherwise its a big waste of money.

Either Lee Valley or Garrett Wade sell a mechanical center point
finder. You could make your own with a length of straight 1/4" steel
rod sharpened to a point on one end. Set up time increases with the
use of anything you have to chuck in and out, however.
FWIW,


Greg G.