I have 3 (foam) daggerboards and noticed the new-to-me board seemed different (fit more snuggly in the trunk, heavier), so I measured it and found that it was 31mm across (widest point on the top) while the other two were only 29mm across. As I understand it, there was only one builder of class-legal boards until the new GRP ones were developed, so why aren't they identical? Was there a change in the design/molds (and when)? Have there been other changes to the foam boards since 1998? What do the new blades (from all builders) measure?