Unfortunetly if I did get that I'd have to buy a new 55g tank so I can properly plumb everything.
I suppose, there are worse things that could happen

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I'm thinking now about the 8 way and drilling the back pane of my acrylic tank for the 8 points of return. This would be driven off of the AM3K on a closed loop.
Carl, regarding siphon break on a spray bar, without it being on a closed loop, or running the plumbing up and over so you can drill for a siphon break near the top, the only other alternative (that I can think of) would be to use a check valve. I've read horror stories about them not working, though...
If it's not too much to ask, could I contact you about getting some renderings of how I might set this up on my tank?