That is the plan logans_daddy. Guess I should have typed a lot more on the page before I posted, but I had to get it up before I messed with it forever and never got it up.
Won't be a "large sump" per say, but I the bottom 20gallon that is in the back will not be visible at all once the stand is completed. The bottom three pictures and plans for what will be in it. I could never do one heater, could never trust it, but will have a couple in there. There will also be two pumps, a large aquaclear, hob skimmer until I can afford a good internal skimmer, and a UV box. The 5.5g that will be going inside will have some macro in it which requires a strong flow and possibly a heavy sand bed. A small section of the 20 G will probably have a sand bed as well. I will try to fill in a lot more details as I get the chance to.
Inside the sump will likely be acrylic due to my current budget and I also have a small gift card for home depot. I have gone back and forth with deciding to drill these displays or not for a long time and well it is time I do it. If I attach any kind of hob overflow it will kill my view. In the backed out view of everything to the very far right you can see just a tiny bit of my corner desk which I spend most of my time at. Right now I can look through both of the tanks. With HOB all over each of them there will be a wall of wires, equipment, and crap between me and the other tank. And to hide it all I would need to put up tacky backing on the tanks. I'd rather just have the glass.
To tired to type more now, will try to update the site when I can.
Jon