Tank is 340 Gallon, total system is approx 1400.
Flow is about 45,000 gallons an hour in the show tank. Yes 11 Tunzes and a monster return.
I have both Lyretails and Bartlett's. About 30 Barletts and 5 Lyretails. I added the fish in groups of 5-10 at a time. Im planning on added another 5 Lyretails and 10 Bartlett's shortly. I don't expect any more aggression than I already have. The Bartlett's always squabble with each other it's in their nature. They never actually hurt each other though.
So your questions are spot on. Seth was right Size matters and the flow question is perfect. The more flow the better for these guys.