The online Bulletins and Mart and Highlights are currently unavailable due to a failure of a network piece of equipment. We are working to replace it and have the Online publications available as soon as possible. Thank you for your patience.
Actually vibrating a hairspring refers to locating the correct spot for the hairspring stud. If its a little too long the watch will run slow, too short makes it runs fast. Theres a tool made specifically for this task.