On Wed, 14 Jul 2010 16:05:43 -0700, Oren wrote:

Maybe with some close-up shots.

Do you have _some_ window experience?

I found my link.

"A remarkably simple but effective precision measurement instrument it
allows accurate measurement of glass and air-gap thickness in single,
double and triple glazed units. "

Enter Merlin.

Video:

http://www.merlinlazer.com/Glass-Measurement-Gauge