I know many of you highly recommend this for any form of repairs and/or upgrades due to its level of detail. I have a Haynes manual, which isn't bad, but isn't great. First, is it one volume or two? I've found some listed online, and some say one volume, some say two. Second, are there any/enough differences between the 2003 and 2004 models to make it worth my time to find a 2004 FSM? The only ones I can find on ebay are 2003.