Everyone,

Thank you for your comments. The overwhelming consensus clearly agrees the Mac Plus benefits from some additional cooling. I thought about placing the Plus on a cooling base designed for laptops. Without performing a proper analysis, I would expect it to be not as effective as a side or rear mounted fan (requiring a case modification) or a fan at the top. The heat generating elements of a laptop are approximately coplaner while the elements in a Plus are distributed within a space.

I think I will use the Kensignton unit. I can always disconnect it for a short time when I need silence.

--David