[Blue Ridge Reef]

I've been a fish keeper for 30 years, and worked as a carpenter/painter/construction for most of my adult life. Built and modified a lot of stuff to sit aquariums on, but without a diagram or photos, there's not much anyone can add. I think I get where you are coming from, but I've had too many things go wrong (recently) between diagram and assembly. FWIW, MDF is more sturdy and water-resistant than plywood, but it's ridiculously heavy. I made a snake hatching rack out of it a few years ago, and had to take a saws-all to it when I need to move it!