Here are the schematics for the back and the right side of the tank.
This is the back.
there will be 4 overflows all feeding their own individual DC pump and then outputting through the 1.5" bulkheads that will be behind the LR structure. the outputs will probably be elbows facing down, but i may have one facing upwards to push flow more up through the LR and back flow the corals more. the gap on the right side is for the wall that is there. the rest of the back of the tank is exposed by the shadowbox in the wall for reach in access to the valves. i plan on painting the back of the tank after i finalize the LR structure, so i can leave the areas behind the LR unpainted so i can peer in behind the LR to check on flow and other nefarious stuff.
the furthest right hole is for the second return. both returns are going to have eductors on them.
the right side:
not much exciting going on here. just the overflow and one of the returns. i may have to "carve" out a little of the framing for the access door to get around the bulkhead for the return. not supporting much except for the the door frame. i expect to only need to "carve" out about 0.5" out of the full width 2X4 that is there.
i still have not cleaned up the area enough to get a picture of how everything stands now, but hopefully by the end of the weekend. i am finishing up the trim painting of wall number one and can move everything back and then get started on wall number 2.
G~