All three are getting close. One of my cuckoos is at the exact same stage. But she has been like that for about a month so I think they might take longer for their eggs to come once their hormones kick in.
So about the no crow collar. We had one on our main rooster and I spaced checking how tight it was for a few weeks because he wasn't acting like it was bothering him. It was a mistake. It chocked him out and we lost him in a matter of minutes. I heard the noises and thought it was them just making a fuss about roosting for the night but knew it was an odd noise. Right after we finished dinner I went to tuck them in and he was dead on the floor. Do not forget to check it if they are not fully grown!! Becoming complacent is so easy to do because you know we all have a million and one things to do. But it's worth taking the time ever other day to check it. I took it off my bantam because honestly his crow isn't extremely loud and won't be putting it on my other rooster for as long as possible.
That's one of the main reasons I haven't put the collar on him either. I just don't want him to die. I'd feel so awful! None of my chickens are particularly friendly. I try to pet them at night when I tuck them into the coop and they are pretty receptive because they are tired and already perched on their roost, but out and about they don't really want me grabbing at them or petting them lol. So it will be hard to get him caught too. His crow isn't bad, but we don't live far from neighbors either, so I just don't want my neighbors to make a fuss about it. His crow isn't any worse than a dog barking in the neighborhood. And if their window to the coop is closed at night (in cold weather it is), his morning crow is not audible.
I'm just trying to hold off as much as possible. It seems he crows about three times a day. Morning, mid day and evening.