Take a sharpie out there and mark the eggs under her or you'll have a staggered hatch which can be disastrous.
I feel your pain. Whenever I look at anything I need to throw away, I think of what else I can use it for.
Cutler Supply and Farm Tek are also good sources.
Sometimes you can get good size remnants at Farm Tek at a discount.
Ruptured blood vessel in the oviduct. Fairly common and not a problem.
Seems like I was always sick because I could never get a good day's sleep. Constantly changing from evenings to midnights and working 7/12s.
I now go to bed shortly after dusk and get up between 3 and 5, get to see sunrise every day and never get sick again.
They are very good in hot weather and in general, so are other Mediterranean breeds or any bird with huge combs/wattles.
If you want to experience lots of varieties, check out Sandhill Preservation. They have a lot of obscure and rare breeds. I believe they still have a deal where you can get a huge mix of whatever is left over from hatches and not sold. I did that once and got 17 breeds. That's a good way to learn characteristics of disparate breeds.
I'm shy of the ice bath calibration.
I had a thermometer I purchased from an incubator company and it was accurate at 70 F but off by 2 degrees at 100.
I prefer to compare them to a medical thermometer because then the comparison will be at close to incubation temperature.
At least that's the way I'll do it till I have more time to do it scientifically or can afford to send them off to be calibrated at Thermoworks.
Hopefully more than one will hatch.
Your temperatures have been low, likely by a degree or so.
Gail Damerow's book 'Chicken Health Handbook' has a similar chart.