on this sandwich construction: wood as the core and fiberglass as the outer layers. does the distance of the fiberglass layers play a part in strength? I would think that if the glass is farther apart(the wood layer is thicker)it would be stronger. is this assumption correct? For instance: if a stronger wood is used then a thinner strip of this wood can be used. But the glass layers will be closer together. will this have to be considered in over all strength of the construction? thanks