Just finished mine for my new tank!
60”x36”x24” tank
2x4 and 2x6 construction. I will be adding a sheet on top as well. But, I added two vertical supports on the “back”, offset from center since plumbing from my external overflow will be routed through. I also added one vertical support in the “front” in the center, I’ll be doing some sort of shelving on each side.