So looks like you have six return pumps total? I remember thinking you had a lot but six?
I'm a little concerned about the two sides, it appears the baffles progressively get lower starting off pretty high, I don't see anyway the two chambers on each side are going to be able to equalize. Is there a gap under all the baffles or what's the deal? What happens if one side requires more water than the other or if more water just happens to drain more to one side? How does it balance?