First off, the case is easily opened by removing a pair of thumbscrews on the left metal cover (window side).  Once the case was open, the first thing that impressed me was that the Centurion 5 has ample room to work in.  Unfortunately, I found out that the motherboard tray (which can be seen in the picture below) is not removable.  This, however, should not prove to be much of a burden for most builders because, as previously mentioned, the case is plenty big enough to work in comfortably.

Looking on towards the front inside now, there are slew of internal 3.5″ drive bays available for this case besides the one designed for the floppy drive.  This will be welcome feature for most computer enthusiasts that have high storage needs and seek a case that can house several hard drives.  An added bonus is that Coolermaster decided to install an 80mm fan in the 3.5″ drive bays for extra cooling.  With today’s high end SATA and SCSI drives screaming in excess of 10k rpm and beyond, the addition of this fan should allow them to stay plenty cool while in operation.

Moving on towards the top on the front inside of the case, the Centurion 5 boasts a pretty standard 5.25″ drive bay compartment.

Just as with the 3.5″ drive bays Coolermaster opted for to include plenty of 5.25″ bays as well.  To install drives into these bays, a fairly standard procedure is followed.  This is done by removing the silver metal piece and the corresponding steel mesh cover on the front.  What’s perhaps most interesting (and a welcome change) is that the mounting of the drives is completely screwless.  Upon removing the metal covers and positioning the drive, the plastic clips of the corresponding drive bay are pushed forward and then a plastic lever is pushed down to lock the drive into place (see the image below).  The plastic clips are only installed on the left side of the case, so I had a couple worries good the drives would be tightened down.  However, upon testing one of these clips out with a 5.25″ optical drive, the drive ended up sitting in the bay pretty securely and I could not pull drive out of the bay with my hands.  If that does not convince you, there are also screw holes available for additional fastening.

Fortunately, this drive mounting procedure is exactly the same for 3.5″ drives as well.  In sum, this whole design is quite advantageous as it allows for easy swapping and upgrading of drives without going through all the hassles of removing and retightening screws.

As I examined the back of the case in more detail, I noticed a similar designed for installing expansion cards.  The expansion bay covers are easily removed for expansion card installation.  Once the expansion cards are installed, they are held in place by a black plastic clip that rotates 90 degrees to fasten/unfasten the card.  There are also screw holes available on each expansion card bay for additional fastening security. Again, there once again is no screwdriver needed adding on to the convenience the Centurion offers to builders.