Thanks RG for doing the comparison of the Original to the 75kg hull design…from what I can tell from the renderings it has confirmed my assumption…

The depth of the hull, width on deck and general design shape appear to be very near the same (at least at the cross section you provide) with just the width of the hull at the water line increased by about 1”…if this is the case, it is very hard to argue that increasing the F-12 design parameters to a crew weight of 75 kg would spoil anything in the way of safety, ease of use (weight), handling or performance for a younger child. It appears as if there is a mind set that sees all these little optimist sized cats flooding the sailing scene when in fact a boat capable of handling a greater crew weight would serve a greater variety of size kids, have a wider appeal to parents as their child will not “outgrow” the boat so quickly and as such, be more economical to own.

regards,
Bob