The way we do it is to look at the wing feathers at about 3-4 days. If the two layers of wing tip feathers are both long then it is a roo. If the bottom layer is long and top layer is short then it is a hen. This does not always apply for all breeds, but is is pretty good for most breeds.
78 is a little high for the incubation period, but totally fine for lockdown. I feel that the humidity thing is a little bit of a spoof. We have been incubating and hatching with a staggered set for a while now. We keep the RH 50% or as close to that as possible. We have had great hatch rates...
You might could get someone to use all those plus bubble wrap and a wet shaving/dirt mix. We've had eggs come in like that and they did well. The shipping is what kills the eggs not so much in the time for shipping. The last few batches we had come in did poorly. Also you may want to wait for...
Talk to the vet and see if they will give an antibiotic shot. We had a little Silver Campine rooster that had his wings chewed off by a racoon at 6 weeks. We got him an antibiotic shot from the vet and kept him bandaged and in the house for a few weeks. Now he lives in his own chicken tractor...
I just pulled out my old Unico Alliance floor model brooder. I was looking to restore it after it is used this season. I am in need of a good clear picture of the Unico decal that is on the top. I know the model of mine is the 150 because it has MODEL 150 painted on the top in stencil letters...