BTW check this out https://www.youtube.com/watch?v=u0oyUsvKS9s&list=PLt7qWuFcHESzPIn_MQWeXxXtCHOOxu7EC&index=6

It's a video from techknight, and he's a wizard at mending stuff. You should definitely try this. I don't know how much you have to screw to get it working as it should. I guess if you tighten it too much you'd risk scratching the surface and therefore damaging the heads and disk.