I tried this and had big temp swings high to low; then I tried putting a wedge under the egg carton to turn the eggs, the did better. Look forward to seeing your results. Hopefully you'll do better than I did!!mine were shipped so I have them in cut out cartons and am tilting the bator externally instead of reaching in to turn. I am also NOW rotating the lid when I tilt them and keeping the egg surface temp higher at 102 instead of 99.5. I think the higher temp has already sped up the process )