The best advice that I got from Kara at NERD was to candle your eggs right before cutting, mark with a light pencil mark an area on the egg where the hatchling is not there and also there is some space between the veining. Then when you are ready to cut you've got a nice guide to where it should be safest to do so.
Good luck and let us know how it went.
That's some good advice. Thanks for sharing that.
What are these mojavas I keep hearing so much about?