I cut when I feel like it's safe to cut. Normally that is day 50-52 or so. I make a small flap in the egg. I get to satisfy my curiosity by seeing what is inside. I then put the eggs back in the incubator. Around day 56 or so I cut a larger opening. I haven't noticed anything drying out or babies that are small or dehydrated. All of them eat and shed normally. If I had concerns, I wouldn't do it. Cutting an egg correctly is not going to keep the animal from absorbing any nutrients. Trying to reposition an animal in the egg to see pattern or color or generally messing with it could cause problems. I think everyone should do whatever they feel comfortable with. If that means waiting until the first one pips, that is great. If it means cutting at day 48, that is cool too. I certainly wouldn't condemn someone for doing it. Where I draw the line is cutting and forcibly removing a hatchling from the egg before it's ready. If my egg cutting makes me a bad guy in someone's book then I believe they haven't looked around enough or read enough threads and seen what a real bad guy looks like. Someone who sends sick or poorly packaged animals. Someone that sends empty boxes or completely scams someone out of animals or money. Those are the bad guys in this hobby, not someone who cuts an egg before an arbitrary day, whether it's 54, 56, 58 or 60.