hello,
from what i have read the Cogito isn't really far ahead of the curve, but they did win. just yesterday i ran across my copy of boatbuilder magazine with the article that cogito guys wrote about their construction techniques. they used the same molds from Patient Lady which i think is an 80's hull shape. they just cut down the freeboard and raised the beams up to compensate. the wing is where the real magic is...if you want to call it that.
you will prolly find these days that a soft sailed 25 would fly a spi. and do best w/ a hull shape designed for a spi. this is just a theory tho, since it appears the 60's hull shape of the Tornado does fine with a spi. it would prolly be a 3 person boat as well. still a good project for those with time and money to spare.