I read that same book and have been drooling to do this to my toerail ever since. I think it is an excellent idea and his cruising tens of thousands of miles proves its seaworthiness and water tightness. Of course, all the standard quality glass work must apply, but the idea is excellent. I'm right there with you, can't wait to do it myself. Good luck.
who is staring at the sea is already sailing a little