Matt,
My cases were 11 3/4" before I packed them and cut the boards down to 10". Since your Mozzie is a bit newer than mine I expect that the trend for reducing centreboard length had already progressed. <img src="http://www.catsailor.com/forums/images/graemlins/cool.gif" alt="" />
Most recent Mozzies now have 10" boards and they are set as far back as the rules allow. Some Mozzies have even gone to less than 10" boards.
Regards,
Peter