55 gallon tank and 29g tank have been ordered and shoud arrive at the lfs next week! The owner of the store said he would build the sump and drill the holes for the drain and return in the back of the 55. I was thinking about having him drill 1" drain holes of the top left and right side of the tank and one 3/4" return in the middle. Not sure how far down the back of the tank they should be drilled. The next issue will be sorting out the surface skimming. I will probably plumb a durso standpipe on the back of the tank in the two drains. Water will flow in, go throug the bulkhead the I will have a "T" fitting. One will drain to the sump and the top will have an end cap with a hole drilled and an air valve.
For the return I haven't figured out what size pump I will need. I assume it'll be best to get a larger pump than needed and regulate it with a ball valve. The return nozzle wil be a "y" splitter with 2 flexible nozzles, one pointing at the surface and 1 down at ~45 degree angle from the surface towards live rock.
I will be running the skimmer hanging on the sump with a phosphate reactor inside the first chamber of the sump. Second chamber will have a dsb refugium and the third will be the return.