Hi

"but they would be too light and it would go against the program of the
boat: eays to build and maintain with locally available materials and
skills."

This is proberly the core issue but please remember how skilled
craftmanship you se from these contries, --- My attitude is ofcaurse
that to further gain and make a relevant promise of a future that work
, these skills shuld be put into digital rather than staying with
methods and tools that was relevant 70 years ago. Now please exchouse
I repeat but 3D-Honeycomb form any shape, it even prove easyer presing
a button to get the intire framework assembly, than adding rib after
rib polyline or spline , translate this into somthing that in it's
aproach is the same Oak rib as you seen in ships from the 17' century
---- it even is easy for the designer, the one who shuld draw eash
frame stringer and rib, to have the computer calculate everything down
millimeter accurancy and in only one material sheet material , as this
also make the same easy foundations for a house --- now do you read me
?

Per Corell