Recently after replacing the original top fans and the rear fan on my Cosmos 1000 I'm starting to hear loud vibrations coming from the HDD area. I managed to slightly reduce this vibration by placing a bit of wood in a 5,25" slot to stiffen the steel. First I thought the vibration was the cause of the new fans but when I turned them all off (including the fans I had installed previously - the bottom fan and the HDD fan.) the 'vibrational sound' was still there. The sound is definitely caused by one of the HDDs - either that one got damaged when I replaced the fans or that something got loose when screwing in the new fans. Let's say it's something that went loose/altered that's causing these loud vibrations, anyone know what it could be?