Layin' Eggs, That's great! You've got the 'staggered hatch' issue taken care of. I have an older model Hova that is pretty reliable.
Good luck with the Hubby-bator.
I hope your 2nd group arrives in better shape than the 1st.
I really feel strongly about egg sellers sending out (what I consider) poorly packaged eggs and blaming it on USPS (in effect, throwing their hands in the air and saying I packaged them as well as I can and boohoo, mean old usps just didn't treat them nice).
Since 1/4/08, I've mailed 37 boxes of eggs.
I've had 2 boxes that were received with a couple of 'cracked' eggs and both of those were boxes with 3 and 4 dozen eggs (I don't ship that many at a time often & need to work on shipping eggs in quantity).
About the bubblewrap and eggs breathing...
Obviously, the eggs don't suffer from lack of air in the short time they travel --- 100% hatch on eggs shipped from SC to CA would prove (to me) that they don't need to 'breathe' while they travel. They might start degrading if they were left in an airless environment for a length of time, I don't know.
You are set and I hope the 2nd group of eggs comes thru hatchable for you,
Lisa