I'm planning on setting up a 90g tank myself. I'm going to run the new 1" SCWD on my CL with a pump (not sure what kind yet) that puts out 1500 to 2000 gph. I think I will most likely only drill one hole for the intake on the CL. Then I plan on running the returns split by the SCWD into 4 outlets, 1 in each corner of the tank. I don't plan on drilling for the returns, rather I'm just going to hard plumb them up over the top of the tank. All of which will be hidden inside the canopy. It should have a clean look, be effective, and pretty simple to build.