I'll let daughter type this:
We are hatching the duck and silkies the same way as the first chicks.
OK, here's how I did it: Three days before hatching I stopped turning the eggs, then anywhere from 1-2 days before they were supposed to hatch, I set up the brooder, started the lamp, and made sure it reached and held the right temp. I moved them to the brooder setup on page one, with the old styrofoam cooler bottom, the plexiglass, the paper towels, and the sponge on a plate. Or, if you wanted to, and actually had the entire cooler (we just had the lower part, hence the plexiglass.) you could cut small square holes in the top and make your own windows.
As far as I know, the temp stays steady for me too. I just put a thermometer in the middle of the brooder, and hold it steady at about 100-101 F, so that way I'm fairly certain that it's at least 99.5 on the edges of the brooder.
Oh, and if you do make your own, remember to poke air holes in the sides!
Ours has a big chip out of the side that we use for ventilation.
Good luck with your hatch!