Looks very good Hawk1. I have the same design, with the two tall pillars on each end. Regarding your question on where to place your Zoa's, i have mine placed in various areas of the tank, top, middle, and bottom. They are all doing well where they are. One down side i have come across to having two pillar design is there is not as many spots to place coral. I am currently down to just three more ideal spots, then I will have to use areas that are not in plain view from the front of the DT. I have a total of 23 various corals in the tank (soft, LPS, and a few SPS). liveaquaria.com is an excellent resource to learn about care, placement, and flow that your corals will need. Happy Reefing!