I just finished one wild ride of a hatching, but with great results! Two power failures, temperature got down to 90 degrees both times, not sure how long first power failure was, but second one was 4 hours. About a week apart. A few hot days later, came home and noticed temp was 104!!! Turned the temperature down a good bit and was okay for a day, then another hot day, outside shed overheated again, and guess what? 104 again!!! Moved the incubator indoors for the last 4 days, and waited nervously for a wiggling egg. On day 20 they started to wiggle, and well, here's the proof - Ain't they gorgeous?