Dear Acat 230
I am not sure that the location of the beams in the A3 is similar to the ASG3 (i.e. front beam 300 mm or 12' aft and rear beam 100 mm or 4'' aft) and hence that the A3's mainsail is similar to the ASG3's (i.e. head 200 mm wider and foot around 200 mm narrower).
May you confirm/detail yr statement?
Besides according to me the BIG question mark is not the curved foils but the totally different mainsail required by the new location of the beams.
So far, at least until the 2009 European Championship, standard head mainsails proved to be faster than BIG head mainsails.