I can live with the smaller spinnaker, |I was not taking into account the one up sailing option, so I think unless we go for different size spinnakers between the two 17.5 sq m is ok, I agree with you on using ISAF I only went for Texel to get the bigger spinnaker in, I also agree with you on 2.6 m beam, funnily enough we were testing a 2.6 m wide platform yesterday and it worked fine. <br> <br>draw height set at 7.5 is lower than I'd really like but I'm not that fussed, incidently we used a 21 sq m spin at the weekend set 30cm below the top of the mast the boat was ballistic, unfortunately we ran aground at full speed (24.8 mph on a gps). The mast held up. <br> <br>We are very enthusiastic about this project and will produce a boat as soon as we all agree the rules <br> <br>Anyway the only thing I'd like to specify now is board length, board length and area is a part of the ISAf formula so to keep at 101 boards will have to be regulated or else people with longer thin boards will have to lose some sail, we have experimented with boards between 450mm and 750mm long, 250mm wide, I think 650 x 250 works well but some limit needs to be set to save recalculating sail area for individual boats, any comments. <br> <br><br><br>