hi all,
am idly thinking of sometime in the future reshaping the daggers and rudders on my old nacra 5.2 to a more modern profile, (round out the forward lower corner of the daggers and removing some of the width of the rudder blades)

but to do so i need to know what they cored with
heavy enough to either be ply or solid glass!

or maybe safer to copy them in shaped ply and then wrap with glass, anyone guess what weight of cloth and how many layers would be needed to provide enough strength?