In my bored moments I've been musing over sails.I assume most sailed are designed for about 80kg - 90kg people ( average sailors weight..?). I have a 6.6m KA Koncept that I use in 5 - 18kts & I like it.The few times I've had it out in about 18kts ( my upper limit) & got it off the wind it felt unbelievably fast, stable & powerful... Unfortunately then I have to change down..Would a sail like that be designed for 18kts + so a lightweight that has to change down as it enters its designed wind range wouldn't get to feel the real benefits ? [}:)]Or it doesn't matter what your weight is?