Why consider meranti? Its readily available here in Singapore and light red meranti is about the same density as pine. Its a bit brittle I hear but made into plywood that problem doesnt seem to manifest.
Why simple semi circular forms? I couldn't find any plans for F16s on the Internet. So I want to make this design free and available for any home builder to build. In my other hobby, aeromodelling, scratch builders are a dying breed so I hope that all the scratch builders who are building kayaks and Moths will come over to cats so there is more info on the Internet.