I really need to get some pictures on here! I drilled the back side of my tank for my overflow (1") into the sump (10 gallon glass). My returns (3/4") are going through a SCWD over the rim of the tank. Mag-5 in-sump return pump (cheaper at MarineDepot.com than your LFS). I made a custom overflow box (6"lx2.5"dx6"h) using acrylic (plexiglass at HomeDepot), my small tablesaw, and aquarium silicone (squeezable tube). The 1" bulkhead that drains into my sump is inside the overflow box on the back wall, centered, and 4" from the water level in the tank. I chose this approach because I wanted to skim the surface water into the sump where the protein skimmers is going to be. Well this is the plan anyways - we'll see tomorrow how it all works!