[Note, the link you point to is for an obsolete set of rules, the official rules, v 2.0, are in the "official documents" forum. However there is no difference between the two documents for that particular rule.]

Thanks, I always forgot to look in the definitions! 6 degrees is not enough to foil on, unless you make the daggerboards stupidly long

As you said, case closed, as long as you want to stay class legal.