I'm a zoologist and science teacher by profession! Can't help myself. But this egg hatching thing is a fun new adventure and I appreciate all your help. As for temperature, I read different things. My DIY incubator is steady at about 100-101, but I have to remove the lid to do stuff and the temp swings. I read that those temp swings don't matter if they are brief.
I'm more concerned that the coop temps have been too low recently and I was not collecting eggs on a daily basis. I'll have to do that going forward, although we are finally getting more normal temperatures here around the Salish Sea of Washington State. No more freezing nights.