Ok so the other week when my head was near my hard drive cage on my mirage I noticed a constant stream of air blowing in my face (I was at the side of the case). Anyway on the opposite side of the hard drive cage is a piece of metal attached to the cage itself which stops any airflow escaping but not on the side to which you can see your motherboard etc..
Long story short, a bit of neoprene rubber + black duct tape = this:
and its now dropped my hdd temp by 1-2C
It also hides the horrid colour of the noctua intake fan I have.
Long story short, a bit of neoprene rubber + black duct tape = this:
and its now dropped my hdd temp by 1-2C
It also hides the horrid colour of the noctua intake fan I have.

Even better would be to somehow get a piece of black aluminum to stay there!