The only things i can suggest - is cable management.
It gets overlooked
all the time...and yet it helps reduce ambient temperature and possible fan stoppage.
Also...400 watt isn't all that much anymore. SLI and Crossfire use a fair amount. I'd recommend getting the link out of my signiture for
PSU Calculator and referencing that in your tutorial...
Check out my pc - 400watts is not enough for half of it...i used to have a 430 watt and i only had 1 less hard drive...it wasn't enough to run it stable.
