I thought I'd make a 1.5mm cushion ring for the AP181 fan, though after fitting I think the mounting screws are so firm that perhaps the cushion has little effect. Anyway with cutter and cheap $1. desk mat sheet out I decided to block up the huge gaps around the 3.5 inch bay cover since they're dust access points. Couldn't stop and did the 5 inch bay covers too.
I may continue the theme thru the whole case, as a kind of sound proofing and color accent ... I'll sleep on it.
Edited by Patosan - 7/28/13 at 7:57pm