I love the sketchup work and the rendering. The idea is fantastic as it is very unique and allows for a wide range of creatures... The only thing I might bring up and please don't take this as a criticism, is the tanks orientation in the room. I would venture to say the original tank shown in the picture, works best as a peninsula. I would just have a hard time looking at that tank from the sofa... I would feel like I was always looking at the system from the side. 2 ways to correct it for me would be switch the orientation of the shelf/ and or drop the front side of the 1st shelf down. Its hard to describe but you would in essence be making a side shelf and a front shelf. If that is the goal of the entire tank, then my apologies as I just missed it but I thought I would throw it out there. Our tanks are our centerpieces.
Cheers