If you cut plywood into strips, stacked them on top of each other and glued, then profiled that, you would have half the wood fibres going parallel to span as before, but the other half would not be parallel to the chord, but perpendicular. Would that turn plywood into a good shear web suitable for covering with laminate?I also failed not one, but TWO plywood centerboards. One on a GP14, another on a 505. Fucking rolling shear. DO not make boards out of plywood. Very bad idea. The cross plies cannot take the shear being reversed repeatedly and fail in "rolling shear"