Ah, I don't know how the idea of test breeding slipped my mind. I've been on the lookout for some more nice bantams locally, but I'm searching in the wrong time of year I guess. I do have a silkie roo I could try pairing the girls with individually to see if they still throw the 2/5 joined toes..if only they'd get back to laying again for me. Good plan, thanks.
I've been incubating them in my trusty Brinsea mini Eco, but it's notoriously bad for hatching out, so they get moved to a homemade styro-bator at lockdown. The humidity fluctuates a lot in the styro, but otherwise it's great.