It will hold, I plan on adding more cross pieces on the bottom and than 1/2” ply to accommodate a 72” sump, if you want to travel I’m in DC area and will help you build your stand. My tank isn’t as tall as yours but is still 480g, should be done buikding it this weekendI’ve never built a stand before and don’t have the necessary tools but I’m compelled to learn since that stand design is clean and appears relatively simple to do. Might be time to learn. Do you think a wooden stand like that can hold the tank along with a 180 gallon sump on the bottom?