That tank figuring guide is a nice thing to keep on your desk top or in your favorites. The only reason I knew something was fishy is because I just made an 800 gallon for my cichlids and my tiger shovelnose. It's 14 long, three foot from front to back and 30" from top to bottom. I'll try and post a pic....
Left side:
Right side:
You have an awsome collection, I must admit, I'm a little jealous. I'll take the marble off your hands