I read this article before integrating my bantams into my standards ex-batts flock and it didn't prevent things from turning into hell. All the points mentioned are useful, but they are not enough if things go wrong. My number one advice would be to choose wisely at which time of year you integrate it can be very complicated if there is only one place to shelter from rain, snow or storms, even with separations.
If I ever write an article one day it I'll be on the lessons I took from our integration disaster.
