Perhaps the Formula 12 class could have two divisions -- a division for 12-foot, entry-level, small-kid boats; and a high-performance division that allows boats up to 12'10".
Like, Formula 12 and Formula 12X. <img src="http://www.catsailor.com/forums/images/graemlins/smile.gif" alt="" />

That would solve all these problems about who wants what from the Formula 12 class.