Examples:
http://www.rightstuf.com/cgi-bin/catalogmgr/TaFXHxlEOOGhNxNlZb/browse/item/90076/4/0/0

http://www.rightstuf.com/cgi-bin/catalogmgr/TaFXHxlEOOGhNxNlZb/browse/item/89720/4/0/0


Pretty sure it has something to do with the disc arrangements in the case or something but not sure.. can anybody explain this to me or send me a picture to show me the difference between a classic line set and a regular set?