Paul, I know you own a file, just take one of the wheelsets and file a flat spot on it lined up on both wheels. Start small and test it until you get the right sound. It actually shouldn't be rocket science.
When you block a person, they can no longer invite you to a private message or post to your profile wall. Replies and comments they make will be collapsed/hidden by default. Finally, you'll never receive email notifications about content they create or likes they designate for your content.
Note: if you proceed, you will no longer be following .