I recently purchased an antec 300 case with a WD caviar blue hard drive and mounted it using the thumbscrews that came with the case. The problem is that it is making a pulsing hum every other second which I read might be due to the mounting and vibrating with the case. I also read you could buy rubber screws or secure it in the air with wires. I am sort of stumped what to do at the moment and I couldn't find where to buy rubber screws in Canada. On a side note the hard drive is refurbished.