Oops, there is a 3.5" HDD bracket for the SM580 - I just incorrectly labelled the 120mm offset adapter and forgot to include that adapter can mount 1x 3.5" HDD instead of a fan.
If you want 3.5" HDD in bottom = add a 120mm bottom adapter to order. We can manually fix orders on Monday to add them as well.
Awesome, thanks!
Just ordered my 580 and added the 120mm adapter like you mentioned for the 3.5" HDD on the bottom. Only thing is that I don't know that it showed up in the final receipt? On the main configuration page it tallied up the extra $10 for the 120mm adapter but on checkout it was $10 less and didn't look like the 120 mm adapter was on the final order summary for the case?