My dealer has a 60" Z Master I'm seriously considering buying, he keeps telling me its and '06 model, but I am almost convinced it is a left-over '05. On some of the older Z Masters I was told that the first for digits of the s/n was the year of manufacure. ie. 2001XXXXXXXX would be a 2001 model year and 2000XXXXXXX would be a 2000. However the s/n on this particular machine is 2400XXXXXXXX. Can anyone help??