Ummm...I have a question....what part of the stand is actually carrying the weight down to the ground? I don't see it. The picture in post 5 caught my eye...the one with the numbers "4229" in it...
Is the weight of the tank going to be supported by the screwed on pieces that hold the exterior wood in place, and the exterior wood (the planks that were stained)? Is that the structural support for the tank? Unless I am missing something, all that weight is going to be supported by screws and planks? Why not have the corner pieces (2x4?) go all the way up instead of stopping 2 inches from the top? At least some of the weight could be taken that way. And some interior diagonal cross bracing could be added, even now.
I have built 3 tank stands myself (29, 55, and my current 90 gallon), and its all about support AND lateral stability. This tank stand LOOKS nice (and I like the sliding doors), but I am concerned and hoping that there is more to this stand than what I can see.