what did you use to build the rack? I was considering legos, but i like yours. I'd just want to add clearance for my fans.
K'nex... I've been building with them since I was 8 
. Much better for structures than legos.
Rigs are hotter with Legos.
and legos are hotter with rigs
And K'nex are always awesome:
No, that is not my build/house, but I have built a few k'nex roller coasters.