Your enclosure looks great. The aluminum extrusion is a great idea. I didn't order an X3 yet but the enclosure (lack of) is a great concern to me.
I have a question though regarding the fog buster. You will still end up some fluid how are you going to drain it?
I wouldn't put the PC up there because the PCs back is exposed. And dust, chips will eventually make it there. Your monitor is also too close to the spindle.
The notebook on the 3D tray looks great on Syil's ad but I wouldn't dare to put any electronic equipment so close to the spindle.
Once you get up and running please post some pics I'd like to see what the machine is capable of.
How much did you have to wait for delivery after ordering the machine?