I guess this is as good a place as any to post this story. I didn't Integrate by the book but did follow the principle. First they were brooded in close enough proximity that they knew each other were there. I then moved on to holding one or two littles so the bigs could see them. Followed by supervised meet and greets in the yard. After some of that with no big issues, they had shared free time mostly un supervised. Today is day one of actually sharing the run. After a couple minutes of some chase and peck (the low hen still being the nasty one), the groups separated. Littles went up under the big's coop extention with the bigs enjoying the open part of the run. A few hens went in to inspect the little's coop (and eat the food, because that flock raiser must be better than their flock raiser). I think it has gone about as well as could be expected. It is now quiet out there, so either dead or they're working it out. I hope this helps someone, sometime.
Fun side story: A couple of days ago a cockerel thought he would challenge the rooster. The rooster tolerated it for a bit then *PECK*. It was funny to watch.