I used to build custom cabinets for a living...I built the stand myself. It is a solid stand the top was not flat but it wasn't as much of an issue with the 72. This tank covers the entire surface of the stand.
I have it on the stand now. The only place that wasn't touching was along part of the front and about 3 or so inches back on the center brace. I have the hardibacker board shimed along the front edge and the tank is touching all the way around now....I'm going to fill it with FW
again and see how it does.
the center brace on the bottom is made differently then the center brace on the top. The brace on the bottom is designed to hold load the same as the outside trim.