I got a question, and please, I'm not trying to lay blame with anyone or say that one way is better than another. When I cut eggs though. I just make that, a cut. I don't bother cutting the whole top off, or a V, or anything like that. I just cut a line. Its worked every time for me, all of my hatchlings have always come out of the line. IMO, I just don't think you need to remove that much egg for them to come out/help them absorb the yoke/whatever. If you like your method though, keep it up, I'm just making a observation.