Hello, This is my first mining rig, done entirely in aluminium 3mm thick, screws are all 1/8 directly screwed to the aluminium (previously threaded) (is that well said?, english not my first language, don't know how to explain it properly).
I think it looks great!
The motherboard looks like it's resting on top of some aluminum (?) pegs. Did you make those or buy them?
This gear gives 1GHash/s (BTC) at stock speeds and eats 450W, I know, small for what i have seen here 
but it's my first attempt, hope u like it.
but it's my first attempt, hope u like it.1 Gh/s sounds low for four 7850s. I have two 7850s, one gets 320Mh/s at 1050 and the other gets 350Mh/s at 1150. Are you running at stock?