My first human powered boat was a 13 ft catamaran made using similar materials and stitch and glue methods. I was living in San Francisco at the time and stability was a primary concern out on the Bay. The drive I am currently using is a second generation I made weeks after the first. It now has dozens of trips over the years and has held up very well. The boat is nice and comfortable and hopefully I can keep it around for a lot longer.
I originally posted more photos on a .mac website. This will be phased out over the next few months, so I am reposting a selection here as an archive.