I never liked the additional tubing in the case. It's just more to work around if you're adding/removing internal components. Plus, many times you fill the port, it can spit back up when air is purging from the system as it's filling.
I'm not sure how the case doesn't deflect, as mentioned, I have the same case and it was too flimsy for my tastes when the 5.25" top supports were removed. With the top supports removed, essentially the only thing preventing the case from torsional loads is the front and rear panel (and bottom HD support if the person is leaving them in). I'm not saying what you did is wrong, if it works for you that is all that matters. For me, that wasn't a solution. Our cases are probably close to the same weight. Mine may be slightly heavier as I have a few custom bay plates I made which are made from spare 1/8 steel I milled out in my vertical millling machine. I believe my rad may be heavier as its quite a bit thicker and I'm running another 200mm Phobya rad in the front of the case. I lightened them up quite a bit but they are still quite heavy.
Here's my build if you're curious...I'm re-posting it slowly for people who missed it. http://www.overclock.net/t/1222289/haf-x-using-sr1-420-and-phobya-200mm-rad-mod-with-images-and-install-information/0_100
Once again, great job. I love to see people trying new things instead of the same old thing. How many different ways can you throw components into a case using different lights to make it light up differently than the next person...if you know what I mean.