Good question Union! I've been thinkng the same thing myself- surely there must be a glass product available today that is srong enough for hatches and ports. I recall seeing a vídeo some time ago about a Florida inventor that came up with a special glass that could withstand hurricane-driven debris hitting windows. I wonder if it ever went to market? FWIW, my hard dodger windscreen panels are made of tempered glass. They're as new and clear as the day they were put in.