Suonds interesting, I certainly was planning on glass sheathing it, for the stiffness.
I was acutely aware when I was trying to right a GP14 with a Milanes board how totally solid it was .. when I had the Wayfarer over on the grass for a bit of maintenaance, I cuold flex the centrebaord 6″ at the tip without even trying too hard, the old ply simply isn’t holding up. I did take it out and re-epoxy all the delaminated areas, but it still was not very stiff.
I’ll PM you about some cedar then, I was just eyeing up some mahogany on fleabay, but cedar would be nicer.