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There is a res, but not like what you've drawn up. There is also a seperate airtrap, which is also linked (oh my, what patience you have!)
Your idea is good, but there's a serious space constraint, where the width of the case is only 8 inches (typical?).
I may very well go that way later, but for now, it's good enough (as Bill would say).
I'd love to simplify the current res design, but it would involve working with raw materials, instead of existing PVC fittings, which are actually a charm to work with, but I just don't have all my tools together (cousin: where's my Dremel?!? Dad, I need that scroll saw and sander!!!).
Right now, I'm concentrating on the PSU array, sorry. I started in a new job today, and got a new PC all to myself

, so SW2K3 is going up very shortly.
I also might add a smoother exit to the fin pattern, just like I've been recommending to all the new blocks that called for it.
Ya'll check out Zymrgy's design,
here: it's the best I've seen in a long time.