I had a hen on several (10-12?) and she hatched a pair. I've had decent incubator hatches though, so I'm not sure what happened to hers. She had her own nest box, but I think she let other girls lay in it too.
Yes, Frizzle cochin. I do not have, nor like, the frizzled serama.
I have 2 splash frizzle hens and 2 blue frizzle hens, but I think you only got one egg from the pen with the blues (C2). The splashes should have been laying, so there's a good possibility of a blue frizzle. I have yet to hatch a female frizzle this year. The few frizzles that have hatched have been male.
My rooster and 1 hen came from Aurora, but my other hens are from GFF. My cockerel in that pen is growing up nicely, I might just kick his daddy out.
I'm definitely getting rid of 2 cockerels this weekend. I caught one trying to mount a call duck, so they will either go to new homes, or hubby and I will have individual skinny chicken dinners. Although, these boys are plenty fat for my dinner.