oh yeah the bottom one has the backside up - is it me or are those fans on the same way round, ie the curve is on the outside. Surely one should be outter curve and one is inner curve ? look at the bottom fan the bottom 5 fins are curved inward and the top 4 find look like they are curved outward ? Compare the lighting on the top and bottom fan the top one looks all the same but the bottom one looks different top half but same bottom half. Also look at the video at 57 seconds it shows the front and back fans the same way round so to me they are either both pushing or both pulling (cant remember which way round is which). I would have expected them to be push/pull or pull/push ?