Replacing the Drivers can be a little confusing. The left and the right drivers look Identical, but there are resistors on the boards to distinguish the placement. Here is a little cheat sheet that can help out. LED Driver Placement
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 .