Nice setup! Any updates? If you don't mind I just got this tank and have a few questions. Your build thread is much more informative than the others.
What do you think is a good turnover rate? I'd like to have a similar sump and wonder what you backed yours down to.
I’m running a Water Blaster 5000 which is rated for right around 900 g/hr, I think. Its running my return and my dual GFO/Carbon reactor. I have it dialed back a fair bit. I’m using both drain lines but the overflow wier/teeth is the choke point. Without modding I can’t see getting more than 600 gal/hr through it.
How much water drains to the sump when the return pump shuts off?
Although I guess that depends on how low your siphon breaks, how low below the surface does your siphon break?
Not sure, maybe 5 gallons. My siphon break holes on my return are set just barely under the water line
How are the mp40s? Enough flow or are they cranked all the way up? Have you tried them on the sides facing each other? I've heard they work unbelievably good that way.
For flow, I think it would be ideal to have them face each other. I wanted the tank three sides viewable with little intrusion, so I put them both on the back and barely notice they're there on the black background
Do the miniflakes move around? I was gonna go with the reefflakes because my coral is getting sandblasted by my sugar grain sand and I wasn't gonna do that again, but I like the finer look to it.
There not bad, They tend to "stick" a little bit better with more age in the tank. I do have to push some back into the front left corner (high flow)about every 4-5 days but I don't get any sand storms
Is there anything you would do different?
- Yeah, I should have added an extra outlet from my return. I would like to have two single reactors rather than a dual. My GFO needs more flow.
- Prazi all my fish in QT 
- used different drawer slides for the hood lift so I could raise it more than 1'