90g Tank Stand

[specrn5]

Here's a sketch of the stand I plan on building for a 90g. Is there any flaws with the design. I tried to copy the ones that I see posted here every now and then.

Also, I am planning to add a 20g long that is going to be displayed in the stand through a cut out in the skin. It will be placed above another 20g that will be the sump. It won't be directly above the other and will be supported by wooden posts attached to the stand. So the above will be slightly offset, so that an overflow will drain to the bottom and also for room for skimmer plumbing.

The plan is for the 90g main display to drain into the 20g display. Then an adequate overflow will drain from the 20g display into the sump and then finally back to the 90g.

If this makes sense to you, is it possible for it to work?