I'll admit that I thought it was a bit strange that eggs were cut when I started looking into bps. Corns are where I came from and in all the time I've bred them, I think I've cut 2 eggs and that was after everyone else had pipped and I figured I'd see what was wrong with the one that hadn't. It's not unusual to have them pip 3-4 days apart. Never once had an issue with a tangled cord or if I did, I didn't know it. Logically, the argument makes sense that the more room and stress that they have, the higher the chance that there will be issues.