Stand is finaly done

[Canadian]

A standpipe inside the overflow box negates any possibility that more than say 5 gallons of water would ever drain out of the main tank (save for both the overflow box and the stand pipe or bulkhead breaking, but I don't see that happening, ever).

There are only two companies that you'll see in Victoria who put holes in the sides of overflow boxes: Seastar and AGA (when you see their corner tanks and their rounded overflows). However, AGA's holes are at the bottom of the overflow but they DON'T feed straight into the overflow box; they actually run the water up an internal wall where it spills over the top. Seastar puts holes in the sides of their overflow boxes but they also put standpipes in all of their overflow boxes (which basically renders the holes in the side useless).

As far as seeing the sides of the overflow box is concerned: there really is no need to see the inside of the overflow box. All you would have had to do is make that side cabinet door (or a piece of trim) cover say 5" of tank length (or however far the overflow box was going to stick out) and you'd never even see the overflow box. And the tank would look like that side of it had a black background. You also could have made it like a back-center overflow box (3 sides) so that the sides of the overflow box didn't actually extend all the way to the side walls of the tank.
Furthermore, as it is now, with a smaller overflow box used as you intend, you're going to need to put a 90 degree elbow in those bulkheads and then place a length of PVC in them (effectively making a stand pipe) unless you enjoy the sound of a sucking and slurping waterfall in your living room.

With that said, this thread is about your stand and your stand looks great. Good work.