Thanks for the video. It's a bit easier to remove and replace the bottom half of the case if you remove the hard disk (secured by the four *short* screws) and optical drive (push in lever to release it) before pulling it off.
Note that the video never explicitly says to remove the tank. It's just magically off the bowl and requires reinstallation. You have to undo those bolts first, then remove the tank.
Thanks for the video. It's a bit easier to remove and replace the bottom half of the case if you remove the hard disk (secured by the four *short* screws) and optical drive (push in lever to release it) before pulling it off.