The screws that hold the hard drives in place are inaccessible to anything but a magnetic screwdriver as they require being lifted about 3-4cm beyond the screw hole before you can get at them, they are also easily lost within the metal structure of the drive bay. The fan's cables itself (two of them, the 3-speed switch and the power cable) are trunked in a small metal channel that runs down the side of the drive bay. When you try and remove the cable from the trunking to remove the fan, the speed switch sticks out in several places and requires unjamming from both the front and the interior angles of the case with both hands - a very tricky 'working blind' job. To make matters worse, if the cable in this channel is even slightly misaligned when the drive bay is pushed back in, the side of the case will cut the wires off - this is how I managed to destroy both of the fans I did when using this case. It's generally best to try not to have to change the fans, it's just too difficult.