This looks great! Everything is coming along nicely. I am surprised you're not getting more responses. I have very little experience with large aquariums and NO experience with a tank your size so I probably won't be of any help, haha. But I'll be following along to learn a thing or two! I have reservations in Punta Cana in May and I can't wait!
I can't believe this tank is made out of glass.. I personally would have chosen acrylic with any tank larger than 400 gallons! I hope you never run into major problems years from now! Can't wait to see what fish and corals you end up stocking this beast!
In Santo Domingo (Dominican Republic), there are ReefCentral few members, personally I have more than 8 years in the hobby. Glad to see a projected scale like that in this small country with stunning tropical coral reefs in their natural state and protect carefully. All our coral frags are captive-bred, from imported colonies, to keep intact natural ecosystems. We are at your order in humbly can help.