After reading all the problems people have been having putting on and taking off the Volcano II, I was pretty nervous about trying it a couple days ago (first system I ever built myself), but it wasn't nearly as bad as it'd been made out to be. Used a screwdriver, applied a very moderate amount of force, and it went on easily. Taking it off was slightly more complicated, but still nothing too bad. Just use a screwdriver, apply some downward force, and pull it out.