vcool said:

Although I have the cap (and regrettably started this now derailed discussion), I never really saw rain as a big concern when egging.  The openings in the DFMT are small enough not much rain would get in, or if they are bigger then the heat of the exhaust should deal with the rain.  Although I'm sure there could be enough rain that it would get in the egg, I suspect I would tap out before the egg would.

I've unintentionally measured the amount of rain that would get in thru the wheel with the petals fully open a couple of times.

After a 2 hour long kickass storm that dropped 2" of rain (according to my backyard rain gauge) the amount of water that was collected in a clean pan I happened to leave on the grate of one of my kamados that was not being used at the time was a whopping...1 tablespoon.

Not really a Noah-like concern.