Well I just went out to a sad sight. While checking under Betty the Broody for stolen eggs, I found a little mummy. Looks like it may have tried to pip, and then got shrink-wrapped in the external membrane, A lot of the shell was off, but the white membrane was fused to the little body. I peeled a bit, and the yolk sac was half absorbed. seemed to be in the right position though.
So I brought in the other egg, not sure if it was the "good egg" or "bad egg" and of course, it's all dark with an appropriate air cell. No movement, no internal pip. Decided to water candle before thinking about opening it, and nothing, until I went to reach to take it out and it twitched.
So I fired up the incubator, set it at 99.4 and 70% humidity. Figured I would give it a day or three and see what happens, Betty can have the golf ball for now. I think it's day 19 today.