How do they look inside candling? I'm not sure that this will make a difference, or that you'll be able to tell (because I couldn't) but if they look like they're not developing perfectly on schedule, this might influence decisions.
With mine, I didn't know they were off schedule. I really couldn't see them very well of course since they were so developed. But based on air sac, some were too big I thought, some too small. But while I was cooling, and looking at them on Sep 7 (they were due Sep 11) I noticed the first pip. They were on the egg turner still.. I think this may have caused complications, some didn't make it. They all hatched early ultimately, out of their shells 1-3 days early.
I'm not sure if this is of any help, but in my case, lock down was late. Maybe if I could ID development better, I would have known?
I'm pretty sure when they're that far along, they're not as sensitive so I'd guess they'd be okay. But if you can, maybe have someone go to your house so they get one turn for two days?