Just did a quick candle on day 5. All 5 AC eggs have veins, as well as 3/4 of the others. Don't think my Marans x is doing anything though, and my 2 green Halfloffbar eggs are almost impossible to see through.(But pretty sure I saw veins)
The AC air cells are so much bigger than the others, so I upped the humidity a bit. Official candle is on Friday.