But surely any sail with 3 cams is a freerace sail !?
Its been noted before that older (deeper/fuller) 7.5 sails compare quite favourably with modern race type large sails.
You can build a sail to do any specific thing you want. Clever bit is building it to do diffent (and contadictory)jobs well.(Which to my mind cammed sails just cant)
Low end power; excellent top end and easy manouvering are difficult attributes to produce along side one another. Tuish Thunderbird IMO is only sail I have used which really does excell in all deparments; (Yes I know it loses out to cammed at very (very) top end compared to some cammed sails but I aint used Severne Freeglide !!!