Don't worry, I've seen lot worser pics. (but I doubt there's that many settings, nowadays cameras below advanced DSLRs don't even have enough external controls)bad pic i dont really have a clue about digital cameras , my wifes has to many settings so i just selected one and hit the button...
You should have just taken few more of them when it goes that well, especially CPU area/how well HSF fits would be interesting.
Also it looks like sides of HDD rack are more open for airflow than earlier.
(big "slot" instead of separate holes: this way)