Thanks for the encouragement, folks. I agree with try, try again. My shipped eggs are in the mail today! We'll see what that adventure brings. Meanwhile, I'm thinking about tweaks:
We just did our eggtopsies. 11 didn't hatch. Here's what we discovered, by category of ills:
First: Of the 11, six didn't have absorbed yolks. What does that say? Details:
*They seemed to all be at the stage where the yolk should have begun to be absorbed (i.e. formed with feathers). From the video of embryo development, I'm guessing that they died before lockdown.
*I'm not aware of any event (like a power shortage...?) that would have caused this, but there may have been a power surge or some such thing... especially if temps were running a bit high and these were somehow nearer stress levels than the others?
I don't know if anyone has ideas about this or not.
Second: One of the eggs was an early quitter. Had a tiny, one-week old embryo and mushy egg yolk and white mixed. This says to me that I need better candling skills.
Third: One had absorbed 75% of his yolk... not sure what that was all about.
Fourth: Two were malpositioned: they had drowned because they couldn't pip the air sack.
Fifth: One was fully formed and in the right position, but just never pipped even his air sack.
1. Plan to keep humidity for first 18 days right around 40-45%
2. The Incuview temp setting was at 95.X (slight variations) pretty much every time I checked. I'm thinking it ran a degree high the whole time. I base that on two things: 1) the early appearance (all within 24 hours, during Day 20) of the hatch, and 2) the fact that my hygrometer/thermometer consistently read 101.X (spiking to 102.X not infrequently) throughout incubation.
I'm doing more testing of this device vis a vis other known temps in my home, and adding I'm also adding a second, wireless hygrometer/thermometer this next time, because during the hatch, the chicks sat on the probe of the one I have and tossed around the display of the one I placed loosely in the incubator, so I couldn't see it; the new one is designed to put an outdoor probe (read: tough) that the display reads wirelessly.
3. A question that has been niggling me is the horizontal nature of the Incuview setup. I was fearing a high number of malpositions. Two out of 25 were malpositioned. Does that seem like a high proportion to you? I plan to manually turn the shipped eggs upright if, as I anticipate, they arrive with rolling air sacks. We'll see!