I think the results of this kind of major effort is going to be disappointing. We were given brand new Hobie18SXs for a Hobie Nationals at Lake Erie: the results were not pleasing what with all the pitchpoling that went on that week. Later on, I remember that the SX concept boats never appeared to be any better or faster than the stock Hobie 18 except when the chute is up (I still use one of them). Heavier with wings does not mean faster.