[Tiara Open] Wet Stingers?

[Sans Peur]

Did they use balsa wood? If so then I would agree with the glass being the strength. If it is anything else then it is all part of the structural integrity of the boat and not just a filler/form. Fiberglass can be a good structural stringer if that is what is was made to do. But just like rebar in concrete, wood inside will contribute to the strength of the form.