The cameras have been baked for a day and a half with dry air passing through them. They are mounted on the telescope, and dry air is circulating. Do not connect the gas flow fittings to the cooling water loop. This will circulate wet water throught the cameras rather than dry air. No, I have not yet made this mistake.
Nothing is ever easy.
A catalog search has not produced a black fitting of the size I need for the air. The only one I can find is white plastic. I guess I will have to paint them. There is a light baffel inside the camera, but I would like to minimize the need to block stray light. I would like one powered by 5 or 15 volts, and which puts out only a modest signal.