Did you ever get your Hamburg? I wasn't that thrilled when I first got mine - quite by accident, and I didn't know if she would ever start laying. When she finally did, she hasn't quit!
She does very well with a flock. Not aggressive and if another is aggressive she just retreats and minds her own business and they forget about her. Very independent, does her own thing,
doesn't eat much at all. The eggs strarted out small, but not so now. I would probably add another in the future, altho they would not have been my breed of choice in the beginning.