the intent of bagweight is obviously to prevent cuben fibre - and any other future fibre unknown at present, but similarly extremely light. the intent is to allow (A VOTE ON) modern composite mainsails using current technology. Did anybody WEIGH IN with a mainsail weight that was less than 30# until this minute? It might have been helpful to have the answer at the time the question was posed. Sailmakers were contacted (this was documented here on the forum), and they did not have this info. They can take the order, build the sail, and then weight it.