I think I had less than a cubic foot to work with when I did my watercooling build too. Props to you for effort... you planned yours out much better than I did. I also know how hard it's going to be to get everything to fit and look good.

I used poor man's AutoCAD - visualized it in my head - so not everything worked the way I was planning, but mine turned out pretty good. It's still an on-going project. Check it out in my sig.