I'll be building a stand for a new 90 gallon drilled tank, so I'm going with
an edge supported design. The whole idea makes me a little nervous to be
honest, but it seems fairly common. But I'm wondering how you cushion the
edges, since there is no bottom under the tank. I have a sheet of Styrofoam
under my present 75 gallon, but this won't work with a bottomless design.