Stand looks AMAZING.
Question: Is that tube to the right on the bottom the drain? If so, if your return pump fails (many reasons for this) your entire tank will drain into your sump and flood. I would use a much longer pipe that's closer to the surface to prevent this. You can easily cover it with rocks if you're worried about it looking funky.
Right. I saw the overflow setup to the rear left but there's what seems to be white pvc towards the front right... I didn't mean to insult your intelligence. I just thought I'd point it out JUST IN CASE.