Awesome! Then I'd say it's gonna be trial and error. Unfortunately you won't see any real aggression until around the 4-6" mark. That's when you will really see how their attitudes are.
I know it doesn't really matter but I'd say add the tankmates why they are still juvies. In the end though it's gonna be up to them if they are gonna allow anything to live with them.
Let's see some pics!!!