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Comment: Thank you for a really practical instructable! Some suggestions: Get two used flash …
Comment: Try a black balloon, or paint the match black with charcoal. Black surfaces absorb ligh…
Comment: You mean the intensity of the dot reflecting off matte surfaces caused eye strain, then…
Comment: Watch you don't get it in your eyes! Perhaps you have a lower powered diode, too low to…
Comment: I was really intrigued by this Instructable. Thank you. I have taken to heart all the c…