Bill: I tried one of those nOt-bOttom-Of-the-line fiberOptic scOpes for bOre examination. It had good resolution for anything more than about 6" away, but the image was WAY out of focus for the bore ie. within 1". frown
I would be very interested if someone has a recommendation for a not top-of-the-line bore scope.
These are high $
http://www.gradientlens.com/Rigid-Borescopes/Hawkeye-Classic-Slim.aspx#6861-overview