This is related to my question about printing portfolios. Essentially, I'm looking for tips people might have for ensuring consistency when printing a group of prints from the same negative. I've printed as many as 35 prints from one negative in one printing session (headshots, oh how I hate thee) and I've had better luck with it recently, but there's always a little more variability between some of the prints than I'd like. Obviously establishing a consistent working method is important, as is keeping an eye on your chemistry so you don't let something go a little too long, but other than that what ideas do you have for making sure you can put together a consistent group of prints? If I'm going to make 20+ prints from one negative, complete with dodging, burning, etc, what can I do to make one print as close to another as possible? Your thoughts are appreciated.