When I set my 120g up, I had many, many long nights eyeballing build threads here on RC. Asking questions of the locals, as well as diving into the equipment threads. So many different ways to accomplish the same thing. I had never touched plumbing before, had never had a sump before. Debated on skimmers and everything else. It was one year, to the day, from when I bought the tank til I had it set up and filled with water and switched on the power to start the thing running. That was how long it took me to plan, debate, re-plan, save money, buy equipment, etc. I wanted everything to be just perfect and, of course, it wasn't. But it worked pretty good right out of the gate with no leaks, no floods, no failures, so that was pretty good. I haven't been on here a bunch in the past couple of years, just occasionally, and it's amazing how things change. Some of the stuff you're talking about I've never even heard of. I ran just regular ol' dursos in the dual overflows of my 120g with a Mag 12 return and I had no noise whatsoever from my overflows. None. So I just kinda get cross eyes when I look at all these diagrams. My lines came down, together in the middle, and out the back of the stand (my sump was in the room behind the tank), and back up the same way. Whether that was the best way or most efficient or whatever, I don't know, but it worked. Don't over think things, pick a way to go and work that direction. Be prepared in case something doesn't work right and you need to change things. Test whatever you can before putting stock in.