How are those air cells looking?
My second batch of 6 eggs should go into lockdown (external pip) on Saturday. My last batch all 3 goslings hatched, but 2 of them I had to help in the middle of zipping due to too dry. If the air cells are too big before day-25 I would bump it right up all the way to hatching. Once they internal pip they'll most likely be fine (sometimes with little help from us).
Good luck with your eggs. Looking forward to see cute fluffy baby photos