Thanks Zissou,
I knew about that thread. The design is very good, however I don't feel it's adequately overbuild. The design will definitely hold any size tank, since I'm not an structural engineer I can't comment too much. But imagine someone pushing the stand side to side, let assume without the plywood skin, the only thing that keep the stand straight is those 2x4 legs connected to the bottom frame, and they buckle easier (not easily) than if the legs goes directly to the floor. The recommendation I got to have the 2x4 legs goes to the floor also came from a rocket engineer if that'll help to add some reassurance.
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