I cut ~day 56. You probably haven't seen anyone mention it because there haven't been many clutches hatching in the month since you joined. The threads will pick up though as newer breeders get eggs on the ground. It's a personal preference of risk vs. benefits. Risks of not cutting: baby can't pip on its own or umbilicus is twisted (baby dies in egg); Risks of cutting: You hit a vein, cut too early, and/or the egg dries out/gets bacteria before it is ready (again, baby dies in egg). If you are going to cut for the first time, you are probably best off waiting until the first baby pips, so you have an idea of how far along the eggs are in development.