The N/A does have a bigger main. It also has longer spreader arms and an intermediate set of diamond wires. Are you thinking of getting Clyde Betts' boat? It has a set of N/A sails but as far as I know he didn't upgrade to the bigger spreader arms and intermediat diamonds. It needs to be done because I've been told that the original mast config will fold with the N/A main in a breeze. He also has the semi-self tacking jib wich is nice. The overlapping one is good for some screaming reaches but not worth the hassle in my opinion.