Here goes. I had a few requests to post a pic of it, so I figured I would just open it up to all and post here.
It is a styro cooler that I got for free from a local fish store. I used an idea given by LordJackel and put in pop bottles with water to hold the temperature when the lid is open. Of course I let them heat up before putting the eggs in. It does have a styro lid that is not shown. Next year I plan on putting in a glass window so I can peek more discreetly
I incubated at 88-89 degrees. I put the t-stat probe in the space between the tubs near their lid level.
I put FWatt along the bottom and then put the bottles atop it and some flourescent-light grid over it for a platform for the egg boxes, which were airtight. To prevent condensation I melted several holes into them with a soldering iron; this worked fine but I did wipe the inner lids of the boxes every week or so to prevent water from dripping excessively. I used perlite/vermiculite mix; I like the coarser vermiculite b/c it is not as dusty as the fine, and seems to have more surface area for moisture.
Helix t-stat is a must in my book. I love it.
Any questions please ask. I am either going to have to get a bigger cooler or use smaller-fooprint egg boxes next year as I will have 3 clutches (hopefully!) not just 2 this year.