If a planset is scaled up or down, is there any reliable way to calculate the change in the load the boat can carry? In other words, if the manufacturer states that the kayak can handle 300 lbs, and I build it to 95% scale, should I expect the result to handle 285 lbs (95% of 300)?

I'm talking about scaling the whole thing, not just changing the length between stations. Although, that is another question: how does lengthening or shortening a design while keeping the beam the same affect things?

Thanks for any comments / help,
Bill Graham