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John you seem to know more about this issue than even Anthony or I. Active cooling is the only way to get a mirrror near ambient. Using the fans you use will get the mirror to about 2 degrees but never to ambient. Have you use a sensor on several areas of the mirror? Laminair fans are not really dealing with the problem and this in your words is just Old School. Some graphed results may change my mind, but there are only a few of us that have done this and I don't recall your name on that list.
Even thin or conical mirrors can take quite a while to cool, Anthony's graphs show that a 14 inch mirror releases heat for many hours even with active cooling. This is less of a problem in coastal areas but in reality what you are saying is well inconsistent to what we have observed and tested.
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