I have to say I never expected buffs from my greys and greys from my buff!!!
I had to leave for work, but last egg in incubator mostly out (by assistance) and resting looks to be solid grey from Leo egg!! Don't know which goose though. He had 2 girls, Lola (grey saddleback) and a cute yearling that still looks like a buff splash. Time will tell after a moult.