The goose eggs don't fit well in the alleged "goose & duck" tray so they only work on the top shelf. That's why on the lower 2 shelves I used those disposable ones cut in half. That works fine. I was looking at the GQF and they show just laying the goose eggs directly on the rack with squidgy spacers between the eggs (and they want like $30 for them). The duck eggs fit fine in the larger trays.
I am putting a clutch in every Sunday until they run out. So the first batch is due 3/16, then 3/32, then 3/30, etc. The oddball will be the chickens which will go into the hatching tray a week earlier than the duck/goose eggs.
I have amazingly had only one duck egg not be fertile (the infamous exploding egg). Out of the first clutch about half were not fertile after 2 weeks. The 2nd and 3rd clutch are doing much better. I also find I cannot clearly candle the goose eggs until a good 14 days in. The shells are just too thick. The duck eggs, though, I could tell at 5 and 7 days easily they were fertile.