If a specific post was interesting or useful to you, we recommend that you Like that post. It tells the post author, and others, that you found the information valuable. Clicking Like is another way to let others know that you enjoy it without leaving a comment.
Log in to join the conversation and Like this content.
Bob, the slot in your photo and the internal sliding parts behind get dust and road crud in them, blast it out with brake cleaning spray and then re-lubricate, this may cure the issue without resorting to 'adjustment'