TIMINGS is also known as Pro Training 2.  It includes a comprehensive textbook, workbook, exam, and twelve videos on five DVDs.  If you want to learn sewing machine repair and can only afford one product, this is it.  Discover all the adjustments your sewing machine needs, how to fine the correct adjustment points, and how to make the adjustments.  The combination of textbook, workbook, and video insures your learning.  This product come on six DVDs and is shipped directly to you.  It is also available as part of the Correspondence Institute with added savings.  TIMINGS spiral bound print version is also available separately.