On CPA theirs a thread about a new Boreascope that can see and photo your Valves ,I've ordered one .. mine will be here Friday http://www.amazon.com/AbleScope-Boresco ... merReviews should be here
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from Vividia
ViVidia AbleScope VA-400 USB Rigid Borescope Endoscope with 180 Degree Articulating 8.5mm Diameter Probe

here's a good link : http://amzn.to/1PsxilA

Cool find. I have a scope but the head doesn't articulate like this, so mine is no good for looking at valves. Once you have one you will find uses for it.