Lookin good! One small question...is there a reason why the top sheet is an inch or so short of the stand at each end? Never built anything like this myself before and was curious.
. Besides water changes won't be too much of a hassle as the storm water drain is just outside my sliding door. So i can hook up a hose to the T (or Y) piece and turn the valve on the side that goes to the sump and use gravity to empty 20% (sump will hold a little more than 20% of tank).

