Hi, I've just got a Coolermaster Centurion 532 case and an Akasa Amber 120mm case fan which comes with 4 mounting screws. There's a hole in the fan guard at each corner but none of these holes is threaded. The holes are also a bit smaller than the screws provided
should the holes be threaded (they were in my last case fan) or do you just screw into the plastic, digging out threads with the screw (for less vibration maybe)? Is this normal, any help would be greatly appreciated before I proceed!