Accidentally cracked open overdue button quail egg--HELP

[TheWeeBee]

My BQ eggs are 2 days overdue and they've been incubating in a Brinsea mini advance. I put them in lockdown 3 days before the due date, and put a soaked sponge in there for extra humidity. I had done a float test on day 16 and had 4 wigglers out of the six eggs I had in there. Put them back in. Day 18: Still no signs of pipping. Did another float test, and one of the previously viable ones sank right to the bottom. Upon dissection it was DIS (looked like it was just a couple days away from hatching )

Another floater that didn't appear to be wiggling I took and broke open at the air sac end of the egg and dammit, there was a live chick in there. The membrane has been punctured and a good section of the inside is now exposed. Little chick's beak can be seen tucked under its wing, still has a heartbeat, does it have a chance? I put them all back in the incubator ASAP.

I am so angry with myself.

 

[TheWeeBee]

My Brinsea didn't come with a humidity gauge and I didn't realize that I had levels up to 99%!!!! That explains the one chick that was dead in shell. Do the others have a chance now that I've lowered the humidity to 70%?

 

[TheWeeBee]

Update: After lowering the humidity as much as possible, I was greeted by two chicks bopping around in the incubator this morning, a third egg rocking, and the exposed egg with the chick still moving around. I was in time to capture the entire hatch of egg #3, and the three chicks have all since dried off and are now snuggled together on a wash cloth under a heat lamp.

Still waiting on chick #4, who has shown some vigorous activity but hasn't yet broken free of its shell.