Any cards you add fasten to the rails where the screws are. I perceive them as "above" the motherboard, but that rail is just closer to the side panel. The slot pillars do nothing. In fact, if the manufacturer made broader slot covers there would be no use for slot pillars.
But the whole concept of covering the backplane is wrong, unless you want to run a negative pressure case.
Dremels I know little about. What I do know is that a nibbler is one of those rarely used tools that is indispensable when I need it.
Edited by ehume - 4/21/12 at 7:44am