Posted on January 19, 2010September 9, 2025 by Dale Phillips Mirror with Penlight Mirror with Penlight by Tim Olsen Originally published in Guild of American Luthiers Data Sheet #22, 1976 and Lutherie Tools, 1990 Simply tape a penlight flashlight (Eveready Heavy duty will do), to a dentist-style 1" round mirror with a 6" or so handle. Position the light to get a 1" spot of light and so that the beam is entirely reflected into the instrument to be inspected. Sight down the barrel of the penlight. The area you see in the mirror will always be full illuminated. This was Dale Kormo’s idea. ◆