I found that the round 80x2mm alu beams are not so stiff as expected. I think these are the recommended ones which most homebuilders use. In choppy waves i can see and feel some vibration in the platform. Compared from memory to my former Nacra 500 it is noticeable more.
Would a replacement with 80x3mm carbon tubes for example bring effectively more stiffness?
How far does a little more flexible platform suffer in speed compared to a optimized platform with more rigid beams? Probably working on my sailing skills has more effect than new beams, but it is always nice to have optimal material for the beloved sport.