during incubation, nor anything wrong with the babies. I have asked the large scale breeders who use this method and they have not seen an unusual amount of deformeties or eggs going bad.
I use two incubators, one at 80F and one at 90F. After two weeks at 80F, I move them to the 90F for the rest of the incubation period. Thats basically all I did. Although I only incubated 3 eggs, I'm confident that when I incubate more of them I will not see any unusual amount of deformities or good eggs going bad.