Very nice build. I stumbled across your build while doing a Google search for 900D 5.25 bay mods. You did the stealth drive bay that I think is a no brainer, but you also cut your 5.25 drive bay covers to fill the recessed space where the fan controller is and it looks great. I was trying to look up if anyone had done that yet because it was something I was thinking of and sure enough you already did it.
Not trying to hijack your thread, but I wanted to ask a question since it looks like you obviously are a seasoned builder.
I am thinking of doing my first water cooled build using the 900D and I noticed that you used a 360 mm radiator up top instead of a 480 mm. Was that just because you had a 360 mm radiator from your previous build or does a 480 mm not fit up there very well?
I was thinking of doing 2 x 480 mm radiators (slim, 45, or 60 mm thick) in the top and bottom front with the fans in pull (so you can see them from the outside like your lower 480 mm radiator). In the 5.25 drive bays I wanted to put a fan controller (Lamptron FC5V2 or FC5V3) and double bay reservoir (XSPC with integrated Laing D5 Vario pump). If there was room I was considering putting my Blu-ray burner in there too:
1 Bay Fan Controller
2 Bay Reservoir with Pump
1 Bay Blu-ray Burner with Stealth Mod
I was thinking that since the fan controllers are never more than an inch or 2 deep it would allow enough room for a 480 mm radiator.