OK, so this next time, 18-24 hours after internal pip, candle, and make your safety hole. Wait another 24 hours. If no progress is made, very slowly begin removing the shell over the air cell.I think he absorbed everything but 1 vein going right through the middle, I couldn't find the yolk so I assume he absorbed it too
What do your birds look like? Are they considered high quality? The fancier the bird, the harder it is for them to hatch.